white page when when log in

I have a problem I get a white page when I go to index.php?option=com_comprofiler
I had an error when instaling CB 2.0 it was

installing core plugin default_language failed with error Plugin version (2.0.0) different from Community Builder version (1.9.1).

And when I go to my edit profile page some of my tabs names are not spelt the way they should
forum is _UE_FORUMTAB
Gallery is _UE_PROFILE_GALLERY
How do I change the language file if this is the problem?

Thanks

Install latest nightly. We found a bug where legacy language PHP files were loading.

I still have the same problem I thought this was CBuilder 2.0 stable ?

I did tools and check community builder database there were 2 tables different so I clicked the fix buttons and now the site is broken but I have uploaded the backup.
What could be wrong with CBuilder 2.0? I thought it was stable? do you need admin access if so how do I give private message?
Thanks

Enable debug mode and maximum error reporting. Ensure you've installed the latest nightly found below.

www.joomlapolis.com/downloads/doc_details/640-community-builder-nightly-build

If issue persists then see what error is displayed. If no error then check server error log to see if any fatal errors present.

The language strings issue is because we do not include CB ProfileBook and CB ProfileGallery language strings with core language files, because those plugins are not core. They are also not yet compatible with CB 2.0. When we release new builds for them they'll include language files.

Yes, CB 2.0 is stable, but it has bugs like any software has bugs. Bug free does not exist. We had months of beta and RC testing available to all subscription levels. That would've been a great time to test and feedback your issues before we released stable.