I suggest wait and try next Beta, and also recommend you only try official addons first.
Don't try adding additional repos before you get some of the standard addons working.
Haha could be waiting a while.. who knows when the next beta will be relaeased? 3months? 6months? ever?
Best just reinstalling the plugins that others have working, if they work on other box's its not a problem with the beta.
And theres also no harm in trying more repos and exploring a bit, tryinmg to fix stuff yourself, if we all just sat and waited fix's without trying to find solutions our selves nothing would be fixed.. until the the next beta.. whenever that will be.. if it even happens.