Unfortunately I have a similar trouble. The plugin broke my website after activation.
I got the message “There is a critical error on your site”, and administrative access was blocked.
I’m using WordPress 5.4.1 with Shop Isle Theme 2.2.5.2
Thank you.
We have released two new version 1 week before, It seems you set up “custom / hide wordpress login link” in buddypress members only setting, in this case, we will add a rule in .htaccess, in the version 2.7.3: when users disable custom / hide wordpress login links, we will remove rewrite rule 🙂
the version 2.7.5: When users deactivate the plugin, we hooked wordpress deactivate API to remove rewrite rule too 🙂