Similar to me, website was updated to PHP8 and I noticed errors when trying to deactivate Comet Cache.
Something like this:
2022/10/19 12:47:16 [error] 259738#259738: *1735622 FastCGI sent in stderr: "PHP message: PHP Fatal error: Uncaught Error: Non-static method WebSharks\CometCache\Classes\Conflicts::maybeEnqueueNotice() cannot be called statically in /var/www/wp-content/plugins/comet-cache/src/includes/classes/Conflicts.php:19
Stack trace:
#0 /var/www/wp-content/plugins/comet-cache/src/includes/uninstall.php(18): WebSharks\CometCache\Classes\Conflicts::check()
#1 /var/www/wp-content/plugins/comet-cache/uninstall.php(7): require_once('...')
#2 /var/www/wp-admin/includes/plugin.php(1241): include_once('...')
#3 /var/www/wp-admin/includes/plugin.php(958): uninstall_plugin()
#4 /var/www/wp-admin/includes/ajax-actions.php(4668): delete_plugins()