I am experiencing this too. Updated the plugin on multiple sites and all were bricked. I checked the debug log on one site and figured out it was this plugin that caused it. Remove the plugin from all sites and they all started working again.
Getting the following error in debug log:
[10-Jul-2022 12:18:05 UTC] PHP Warning: require_once(/sitefolder/public/app/plugins/wp-crontrol/vendor/autoload.php): failed to open stream: No such file or directory in /sitefolder/public/app/plugins/wp-crontrol/wp-crontrol.php on line 45
[10-Jul-2022 12:18:05 UTC] PHP Fatal error: require_once(): Failed opening required '/sitefolder/public/app/plugins/wp-crontrol/vendor/autoload.php' (include_path='.:/usr/share/php') in /sitefolder/public/app/plugins/wp-crontrol/wp-crontrol.php on line 45