Switching Membership Plugins for WordPress

Site was using Ultimate Member with BuddyPress and everything seemed to work until it didn't. Have now switched to Simple Membership but there are still minor issues that keep cropping up. Can't seem to display the password reset screen, and logging in with Simple Membership, the site doesn't seem to recognise the login. Another problem seems to be with the Kadence theme, some of the colour updates don't seem to take effect.

There also now appears to be a plugin conflict that's affecting Elementor, so this needs to be resolved