Undefined array key “complianz”

My WP Setup is up to date and then i installed “User Switching” Plugin. I switched to another user and suddenly since that i can not view /wp-admin/users.php. I get the following error:

Warning: Undefined array key "complianz" in /var/www/bwkg/bw-kg.de/wp-content/plugins/complianz-gdpr/class-admin.php on line 783

Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /var/www/bwkg/bw-kg.de/wp-content/plugins/complianz-gdpr/class-admin.php:783 Stack trace: #0 /var/www/bwkg/bw-kg.de/wp-includes/class-wp-hook.php(308): cmplz_admin->register_admin_page() #1 /var/www/bwkg/bw-kg.de/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters() #2 /var/www/bwkg/bw-kg.de/wp-includes/plugin.php(517): WP_Hook->do_action() #3 /var/www/bwkg/bw-kg.de/wp-admin/includes/menu.php(155): do_action() #4 /var/www/bwkg/bw-kg.de/wp-admin/menu.php(428): require_once('...') #5 /var/www/bwkg/bw-kg.de/wp-admin/admin.php(158): require('...') #6 /var/www/bwkg/bw-kg.de/wp-admin/users.php(11): require_once('...') #7 {main} thrown in /var/www/bwkg/bw-kg.de/wp-content/plugins/complianz-gdpr/class-admin.php on line 783