Errors php

I got a lot of errors after the latest install

`10.06.2022 18:10:13 PHP Warning: Undefined variable $disable_first in /mnt/web515/d2/68/510778268/htdocs/STRATO-apps/wordpress_03/app/wp-content/plugins/subscribe-to-comments-reloaded/templates/user.php on line 189
10.06.2022 18:10:13 PHP Warning: Undefined variable $current_url in /mnt/web515/d2/68/510778268/htdocs/STRATO-apps/wordpress_03/app/wp-content/plugins/subscribe-to-comments-reloaded/templates/user.php on line 194
10.06.2022 18:10:13 PHP Warning: Undefined variable $disable_prev in /mnt/web515/d2/68/510778268/htdocs/STRATO-apps/wordpress_03/app/wp-content/plugins/subscribe-to-comments-reloaded/templates/user.php on line 200
10.06.2022 18:10:13 PHP Warning: Undefined variable $subscriptions_pagenum in /mnt/web515/d2/68/510778268/htdocs/STRATO-apps/wordpress_03/app/wp-content/plugins/subscribe-to-comments-reloaded/templates/user.php on line 205
10.06.2022 18:10:13 PHP Warning: Undefined variable $current_url in /mnt/web515/d2/68/510778268/htdocs/STRATO-apps/wordpress_03/app/wp-content/plugins/subscribe-to-comments-reloaded/templates/user.php on line 205
10.06.2022 18:10:13 PHP Warning: Undefined variable $disable_last in /mnt/web515/d2/68/510778268/htdocs/STRATO-apps/wordpress_03/app/wp-content/plugins/subscribe-to-comments-reloaded/templates/user.php on line 248

How can i fix this?

Thanks
Andre