Fatal error with PHP 8

Hello @artprojectgroup,

Thank you for contacting the support, and sorry for the inconvenience caused.

Please make sure that you are using the latest version of our plugin. https://rankmath.com/changelog/

If the issue persists on the latest version, please use this troubleshooting guide to check if it is caused due to a conflict with some other plugin or your theme: https://rankmath.com/kb/check-plugin-conflicts/

Here is a video you can follow as well:

Only the site admin would know, and your users won’t be affected by this troubleshooting.

Let us know how that goes. Looking forward to helping you.

Tried again with version 1.0.96 and Rank Math SEO PRO 3.0.19 with same error:

Fatal error: Uncaught Error: Cannot access offset of type string on string
in /home/xxx/public_html/wp-content/plugins/seo-by-rank-math/includes/modules/schema/class-frontend.php on line 73

Pila de llamadas:

RankMath\S\Frontend::RankMath\S\{closure}()
array_filter()
wp-content/plugins/seo-by-rank-math/includes/modules/schema/class-frontend.php:74
RankMath\S\Frontend::add_schema()
wp-includes/class-wp-hook.php:307
WP_Hook::apply_filters()
wp-includes/plugin.php:235
apply_filters_ref_array()
wp-content/plugins/seo-by-rank-math/includes/traits/class-hooker.php:102
RankMath\S\JsonLD::do_filter()
wp-content/plugins/seo-by-rank-math/includes/modules/schema/class-jsonld.php:150
RankMath\S\JsonLD::json_ld()
wp-includes/class-wp-hook.php:307
WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:331
WP_Hook::do_action()
wp-includes/plugin.php:524
do_action_ref_array()
wp-content/plugins/seo-by-rank-math/includes/traits/class-hooker.php:88
RankMath\F\Head::do_action()
wp-content/plugins/seo-by-rank-math/includes/frontend/class-head.php:156
RankMath\F\Head::head()
wp-includes/class-wp-hook.php:307
WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:331
WP_Hook::do_action()
wp-includes/plugin.php:476
do_action()
wp-includes/general-template.php:3042
wp_head()
wp-content/themes/adrihosan/header.php:20
require_once()
wp-includes/template.php:770
load_template()
wp-includes/template.php:716
locate_template()
wp-includes/general-template.php:48
get_header()
wp-content/themes/adrihosan/page.php:15
include()
wp-includes/template-loader.php:106
require_once()
wp-blog-header.php:19
require()
index.php:17

Tried with Health Check & Troubleshooting plugin active, Twenty Two, Rank Math SEO, Rank Math SEO PRO and Query Monitor (to display the errors) and this is what we get:

Fatal error: Uncaught Error: Cannot access offset of type string on string
in /home/xxx/public_html/wp-content/plugins/seo-by-rank-math/includes/modules/schema/class-frontend.php on line 73

Pila de llamadas:

RankMath\S\Frontend::RankMath\S\{closure}()
array_filter()
wp-content/plugins/seo-by-rank-math/includes/modules/schema/class-frontend.php:74
RankMath\S\Frontend::add_schema()
wp-includes/class-wp-hook.php:307
WP_Hook::apply_filters()
wp-includes/plugin.php:235
apply_filters_ref_array()
wp-content/plugins/seo-by-rank-math/includes/traits/class-hooker.php:102
RankMath\S\JsonLD::do_filter()
wp-content/plugins/seo-by-rank-math/includes/modules/schema/class-jsonld.php:150
RankMath\S\JsonLD::json_ld()
wp-includes/class-wp-hook.php:307
WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:331
WP_Hook::do_action()
wp-includes/plugin.php:524
do_action_ref_array()
wp-content/plugins/seo-by-rank-math/includes/traits/class-hooker.php:88
RankMath\F\Head::do_action()
wp-content/plugins/seo-by-rank-math/includes/frontend/class-head.php:156
RankMath\F\Head::head()
wp-includes/class-wp-hook.php:307
WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:331
WP_Hook::do_action()
wp-includes/plugin.php:476
do_action()
wp-includes/general-template.php:3042
wp_head()
wp-includes/template-canvas.php:17
include()
wp-includes/template-loader.php:106
require_once()
wp-blog-header.php:19
require()
index.php:17

Same issue ??

For your information, Query Monitor display this with PHP 7.3:
1.- Illegal string offset ‘@type’ in wp-content/plugins/seo-by-rank-math/includes/modules/schema/class-frontend.php:73
2.- Uninitialized string offset: 0 in wp-content/plugins/seo-by-rank-math/includes/modules/schema/class-frontend.php:73

Best regards.

Hello @artprojectgroup,

The warning appears when there is a corrupted Schema entry in your database.

Remove the Schema from those pages that are showing this warning in the query monitor and apply it again to fix the issue. If you are not able to access the Schema tab on those pages, you can use the Bulk Actions to set the Schema to none as you are using the PRO version:
https://rankmath.com/kb/bulk-editing-in-rank-math/#bulk-actions

Let us know how that goes.

Also, since you are using the PRO version, please open a new support ticket on our forums:
https://support.rankmath.com/

Looking forward to helping you.