About the Crash of my Website

My website crashed two times because of the Rank Math Premium SEO Plugin. Mr Bhanu asked me to open a ticket to resolve this issue as soon as possible.

I need my website for my sales. I’ve included the details and links below.

https://ibb.co/mbtMjxv
https://ibb.co/q0p1d71

Can you please fix this issue as soon as possible?

My Website: mentalsea.co.uk

Best Regards
Deniz Ayan

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WordPress has a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

In this case, WordPress caught an error with one of your plugins, Rank Math SEO.

First, visit your website (https://mentalsea.co.uk/) and check for any visible issues. Next, visit the page where the error was caught (https://mentalsea.co.uk/wp-login.php?redirect_to=https%3A%2F%2Fmentalsea.co.uk%2Fwp-admin%2Fplugin-install.php%3Fs%3Ddebug%26tab%3Dsearch%26type%3Dterm&reauth=1) and check for any visible issues.

Please contact your host for assistance with investigating this issue further.

If your site appears broken and you can’t access your dashboard normally, WordPress now has a special “recovery mode”. This lets you safely login to your dashboard and investigate further.

To keep your site safe, this link will expire in 1 day. Don’t worry about that, though: a new link will be emailed to you if the error occurs again after it expires.

When seeking help with this issue, you may be asked for some of the following information:
WordPress version 6.6.1
Active theme: Eduma (version 5.4.1)
Current plugin: Rank Math SEO (version 1.0.226)
PHP version 8.1.29

Error Details
=============
An error of type E_ERROR was caused in line 91 of the file /srv/htdocs/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/class-router.php. Error message: Uncaught Error: Class “RankMath\Helpers\Str” not found in /srv/htdocs/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/class-router.php:91
Stack trace:
#0 /wordpress/core/6.6.1/wp-includes/class-wp-hook.php(324): RankMath\Sitemap\Router->reduce_query_load(”)
#1 /wordpress/core/6.6.1/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#2 /wordpress/core/6.6.1/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#3 /wordpress/core/6.6.1/wp-settings.php(678): do_action(‘after_setup_the…’)
#4 /srv/htdocs/wp-config.php(84): require_once(‘/wordpress/core…’)
#5 /wordpress/core/6.6.1/wp-load.php(55): require_once(‘/srv/htdocs/wp-…’)
#6 /wordpress/core/6.6.1/wp-login.php(12): require(‘/wordpress/core…’)
#7 {main}
thrown