Critical error after 2.0.1 Update

Hello,

I was pleased that there was an update after a long time.

But does it generate a critical error when I deactivate it?

The following is the error message;

When seeking help with this issue, you may be asked for some of the following information:
WordPress version 6.0
Active theme: xxx Child Theme (version 4.9)
Current plugin: APG Google Image Sitemap Feed (version 2.0.1)
PHP version 8.0.3

Error Details
=============
An error of type E_ERROR was caused in line 41 of the file /var/www/vhosts/xxx.de/xxx/wp-content/plugins/google-image-sitemap-feed-with-multisite-support/includes/admin/clases/xml.php. Error message: Uncaught TypeError: count(): Argument #1 ($var) must be of type Countable|array, bool given in /var/www/vhosts/xxx.de/xxx/wp-content/plugins/google-image-sitemap-feed-with-multisite-support/includes/admin/clases/xml.php:41
Stack trace:
#0 /var/www/vhosts/xxx.de/xxx/wp-includes/class-wp-hook.php(307): APGSitemapImage->rewrite()
#1 /var/www/vhosts/xxx.de/xxx/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters()
#2 /var/www/vhosts/xxx.de/xxx/wp-includes/plugin.php(524): WP_Hook->do_action()
#3 /var/www/vhosts/xxx.de/xxx/wp-includes/class-wp-rewrite.php(1458): do_action_ref_array()
#4 /var/www/vhosts/xxx.de/xxx/wp-includes/class-wp-rewrite.php(1488): WP_Rewrite->rewrite_rules()
#5 /var/www/vhosts/xxx.de/xxx/wp-includes/class-wp-rewrite.php(1859): WP_Rewrite->wp_rewrite_rules()
#6 /var/www/vhosts/xxx.de/xxx/wp-content/plugins/google-image-sitemap-feed-with-multisite-support/apg-xml-sitemap.php(41): WP_Rewrite->flush_rules()
#7 /var/www/vhosts/xxx.de/xxx/wp-includes/class-wp-hook.php(307): apg_image_sitemap_actualiza()
#8 /var/www/vhosts/xxx.de/xxx/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters()
#9 /var/www/vhosts/xxx.de/xxx/wp-includes/plugin.php(476): WP_Hook->do_action()
#10 /var/www/vhosts/xxx.de/xxx/wp-admin/includes/class-plugin-upgrader.php(371): do_action()
#11 /var/www/vhosts/xxx.de/xxx/wp-admin/update.php(51): Plugin_Upgrader->bulk_upgrade()
#12 {main}
thrown

Best regards

Torsten