Blocking Usernames

This is not a PMPRo question; PMPro question uses the standard WP user management functions. You can either post this question in the WP support forum https://www.ads-software.com/support/ or try Google. There’s at least one plugin available that might help. https://www.ads-software.com/plugins/restrict-usernames/

the plugin restrict usernames does not work with pmpro. It does work if I don’t use pmpro.

Trying the other suggestions…

I’ve tried several methods so far and they work as long as i don’t have the pmpro plugin active. I do not at this moment see a way to restrict usernames with this plugin in use.