When I looked at the log file of my website, I saw the following error messages.

When I looked at the log file of my website, I saw the following error messages. Do you have a suggestion for a fix?

The plugins I use are:

Akismet Anti-Spam
Classic Widgets
Contact Form 7
Everest Forms
Featured Image Admin Thumb
Flash Toolkit
FooBox Image Lightbox
Join.chat
Classic Editor
Login No Captcha reCAPTCHA (Google)
Page Builder by SiteOrigin
PDF Generator For Wp
Post Type Switcher
Responsive Tabs
Webriti Companion
WP Force SSL
WP Super Cache
Yet Another Related Posts Plugin (YARPP)
Yoast Duplicate Post
Yoast SEO
Broken Link Checker

Error code is here:

`[22-Apr-2022 11:50:20 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 11:52:17 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 12:22:09 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-content/plugins/wp-force-ssl/wp-force-ssl.php on line 929
[22-Apr-2022 12:22:09 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1355
[22-Apr-2022 12:22:09 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1358
[22-Apr-2022 12:44:30 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 13:34:56 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 13:53:26 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 14:14:17 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-content/plugins/wp-force-ssl/wp-force-ssl.php on line 929
[22-Apr-2022 14:14:17 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1355
[22-Apr-2022 14:14:17 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1358
[22-Apr-2022 14:45:21 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 15:37:56 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-content/plugins/wp-force-ssl/wp-force-ssl.php on line 929
[22-Apr-2022 15:37:56 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1355
[22-Apr-2022 15:37:56 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1358
[22-Apr-2022 15:46:30 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-content/plugins/wp-force-ssl/wp-force-ssl.php on line 929
[22-Apr-2022 15:56:36 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-content/plugins/wp-force-ssl/wp-force-ssl.php on line 929
[22-Apr-2022 15:56:36 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1355
[22-Apr-2022 15:56:36 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1358
[22-Apr-2022 17:22:50 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 18:34:36 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 20:28:52 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 20:30:01 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 20:31:03 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 20:32:14 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 20:33:03 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 20:33:37 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 20:34:26 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 21:51:31 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 22:02:12 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 22:19:22 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 22:53:38 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 22:57:47 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-content/plugins/wp-force-ssl/wp-force-ssl.php on line 929
[22-Apr-2022 22:57:47 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1355
[22-Apr-2022 22:57:47 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1358
[22-Apr-2022 23:21:29 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[22-Apr-2022 23:46:03 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-content/plugins/wp-force-ssl/wp-force-ssl.php on line 929
[22-Apr-2022 23:46:03 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1355
[22-Apr-2022 23:46:03 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1358
[22-Apr-2022 23:46:06 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-content/plugins/wp-force-ssl/wp-force-ssl.php on line 929
[22-Apr-2022 23:46:06 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1355
[22-Apr-2022 23:46:06 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1358
[22-Apr-2022 23:46:10 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-content/plugins/wp-force-ssl/wp-force-ssl.php on line 929
[22-Apr-2022 23:46:10 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1355
[22-Apr-2022 23:46:10 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1358
[22-Apr-2022 23:53:40 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[23-Apr-2022 00:06:35 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[23-Apr-2022 02:15:45 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-content/plugins/wp-force-ssl/wp-force-ssl.php on line 929
[23-Apr-2022 02:15:46 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1355
[23-Apr-2022 02:15:46 UTC] PHP Warning: Cannot modify header information – headers already sent by (output started at /home2/detaytik/public_html/wp-content/plugins/pdf-generator-for-wp/package/lib/dompdf/vendor/dompdf/dompdf/src/Adapter/CPDF.php:1199) in /home2/detaytik/public_html/wp-includes/pluggable.php on line 1358
[23-Apr-2022 03:27:57 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322
[23-Apr-2022 03:36:01 UTC] PHP Warning: Attempt to read property “ID” on null in /home2/detaytik/public_html/wp-content/plugins/flash-toolkit/includes/functions-flash-core.php on line 322`

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