[
{
"message": "TypeError: Cannot read properties of null (reading 'addEventListener')\n at /wp-content/plugins/quizad/assets/js/registration.js?ver=2.0.0:121:20\n at /wp-content/plugins/quizad/assets/js/registration.js?ver=2.0.0:184:3",
"trace": null,
"code": null
}
]
Resource errors
None
QuizAd → Zaawansowane
URL
/wp-admin/admin.php?page=my-submenu-zaawansowane
Aspect
menu-item
HTTP status
200
Load time
0.997 s
Memory usage
3.93 MiB
JS errors
None
Resource errors
None
Test site – Just another WordPress site
URL
/
Aspect
front-page
HTTP status
200
Load time
0.858 s
Memory usage
4.33 MiB
JS errors
None
Resource errors
None
Benchmark
URL
Load time
Memory usage
Inactive
Active
Change
Inactive
Active
Change
/wp-admin/index.php
0.679 s
1.328 s
+0.649 s
3.92 MiB
4.01 MiB
+ 84.91 KiB
/wp-admin/edit.php
0.509 s
0.722 s
+0.213 s
3.98 MiB
4.06 MiB
+ 83.44 KiB
/wp-admin/post-new.php
1.811 s
2.216 s
+0.405 s
6.56 MiB
6.66 MiB
+ 107.87 KiB
/wp-admin/upload.php
1.236 s
0.834 s
-0.402 s
3.89 MiB
3.95 MiB
+ 66.34 KiB
/wp-admin/options-writing.php
0.734 s
0.546 s
-0.188 s
3.86 MiB
3.93 MiB
+ 70.02 KiB
/wp-admin/media-new.php
0.601 s
0.579 s
-0.022 s
3.85 MiB
3.93 MiB
+ 78.22 KiB
/wp-admin/edit-tags.php?taxonomy=category
0.515 s
0.924 s
+0.409 s
3.86 MiB
3.95 MiB
+ 83.39 KiB
/wp-admin/post-new.php?post_type=page
1.944 s
1.739 s
-0.205 s
6.55 MiB
6.65 MiB
+ 103.39 KiB
/wp-admin/options-discussion.php
0.618 s
0.633 s
+0.015 s
3.86 MiB
3.93 MiB
+ 66.52 KiB
/wp-admin/edit-comments.php
0.553 s
0.881 s
+0.328 s
3.88 MiB
3.95 MiB
+ 66.02 KiB
/
0.297 s
0.654 s
+0.357 s
4.23 MiB
4.33 MiB
+ 106.44 KiB
Average
0.863 s
1.005 s
+0.142 s
4.4 MiB
4.49 MiB
+ 83.32 KiB
Code Statistics
Note: Third-party libraries and minified JS/CSS files are excluded from these statistics where
possible, so the numbers you see here may be lower than those reported by other tools.
Things that the plugin adds to the site. This section is not intended to be comprehensive.
The test tool only looks for a few specific types of added content.
Database Tables 4
quizAd_froc_credentials
quizAd_froc_placements
quizAd_froc_placements_positions
quizAd_froc_websites
PHP Error Log 2 lines
[01-Jun-2026 16:49:10 UTC] WordPress database error Cannot truncate a table referenced in a foreign key constraint (`wordpress`.`quizAd_froc_placements_positions`, CONSTRAINT `quizAd_froc_placements_positions_ibfk_2` FOREIGN KEY (`placement_id`) REFERENCES `wordpress`.`quizAd_froc_placements) for query TRUNCATE TABLE quizAd_froc_placements made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/twentyseventeen/index.php'), get_template_part, locate_template, load_template, require('/themes/twentyseventeen/template-parts/post/content.php'), the_content, apply_filters('the_content'), WP_Hook->apply_filters, QuizAd\Service\Wordpress\PageService->quizAd_insertPlacement, QuizAd\Service\Placements\PlacementsService->getPlacements, QuizAd\Service\Placements\PlacementsService->fetchAllPlacement, QuizAd\Database\PlacementsRepository->removeAllPlacements, QuizAd\Database\AbstractDatabaseRepository->query
[01-Jun-2026 16:49:26 UTC] WordPress database error Cannot truncate a table referenced in a foreign key constraint (`wordpress`.`quizAd_froc_placements_positions`, CONSTRAINT `quizAd_froc_placements_positions_ibfk_2` FOREIGN KEY (`placement_id`) REFERENCES `wordpress`.`quizAd_froc_placements) for query TRUNCATE TABLE quizAd_froc_placements made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/twentyseventeen/index.php'), get_template_part, locate_template, load_template, require('/themes/twentyseventeen/template-parts/post/content.php'), the_content, apply_filters('the_content'), WP_Hook->apply_filters, QuizAd\Service\Wordpress\PageService->quizAd_insertPlacement, QuizAd\Service\Placements\PlacementsService->getPlacements, QuizAd\Service\Placements\PlacementsService->fetchAllPlacement, QuizAd\Database\PlacementsRepository->removeAllPlacements, QuizAd\Database\AbstractDatabaseRepository->query
