Hello,
It looks like you have updated a file in the repository without releasing an update. Please don’t do that! It triggers Wordfence to throw a warning that the file may have been infected by a hacker.
wp-content/plugins/broken-link-checker/broken-link-checker.php
Requires PHP version changed from 7.2 to 7.4
I know this change isn’t a programmatic change, but even this change should only be done in combination with a real versoion increase.