Rather than leave a cryptic review without any detail and the headline not relating to the content you would be better off raising a support ticket with your issue so the plugin author can at least initially respond.
Referring to your headline ‘Error 500 when deleted’ this plugin does not touch any external files ( unlike some redirect plugins that modify .htaccess ) so it is an impossibility for this plugin to do anything, including create an error, after it has been deleted. I note you have been testing, and negatively reviewing several 404 plugins – perhaps you got the error mixed up?
The content of your review says ‘Can not paste custom URL’ which perhaps should be your review title – however in the plugin’s defence it doesn’t claim that as a feature.
This reply was modified 2 years, 3 months ago by Fullworks.