hi.
same problem
this problem is from php 7.2 | 7.3. on php7 its okay. (i think)
here the full error log
#0 plugins/contact-form-7/modules/really-simple-captcha.php(62):
wpcf7_generate_captcha(Array)
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#1 plugins/contact-form-7/includes/form-tags-manager.php(340):
wpcf7_captchac_form_tag_handler(Object(WPCF7_FormTag))
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#2 plugins/contact-form-7/includes/form-tags-manager.php(269):
WPCF7_FormTagsManager->scan_callback(Array, true)
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#3 [internal function]: WPCF7_FormTagsManager->replace_callback(Array)
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#4 plugins/contact-form-7/includes/form-tags-manager.php(186):
preg_replace_callback(‘/(\\[?)\\[(accept…’, Array, ‘<p>\xD9\x86\xD8\xA7\xD9\x85 \xD8\xB4\xD9\x85\xD8…’)
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#5 plugins/contact-form-7/includes/form-tags-manager.php(168):
WPCF7_FormTagsManager->scan(‘<p>\xD9\x in /home/foxgrcl/public_html/wp-content/plugins/contact-form-7/modules/really-simple-captcha.php on line 461
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