[Plugin: Extended Super Admins] Getting a million "Notices"

This is the basic “Notice” I get when I go to settings for the plugin:
“Notice: Undefined index: WP-CRM: Add User Messages in D:\example.com\wp-content\plugins\extended-super-admins\class-extended_super_admins.php on line 627”

It looks like I’m getting one notice for each capability for each role – all refer to line 627.

I don’t know if this has anything to do with the slowness, but its pretty slow loading. Otherwise it seems to be working. The slowness isn’t much of an issue as I don’t use it much. I just want to be sure the “notices” are nothing for me to be concerned about.

Thank you for this plugin, it really meets a need for me.

https://www.ads-software.com/extend/plugins/extended-super-admins/