Re: Members, Groups, etc. not working after changing themes [Solved]
@djpaul You are a genius! I figured out what was wrong. I wanted to be sure I had your assumed setup and after deactivating my plugins everything worked. I had at some time activated a plugin called qTranslate (https://wordpress.org/extend/plugins/qtranslate/) which broke BuddyPress.
So if anybody else runs into my problem, try deactivating all plugins to see if anyone of them is causing the weird behavior.
Should a plugin like that be able to break another plugin? Do we need some sort of a plugin interoperability page to inform users what works together and what does not work together?