After bleeding edge update frontend is broken

[PeterPan]

after updating to bleeding edge, this is all what you see in frontend

after disabling all non thirty bees modules it looks first good, but when clicking on a product the product page looks like the following, still broken

then i deactivated all overrides, now it works, but when I choose now a category, it is still broken

maybe there is any idea?

[wakabayashi]

Css seems to be missing. Delete cache. If this doesnt help try some setting changes under performances. 

[PeterPan]

hm, that doesn´t work..

[datakick]

look into your server error logs, or into logs directory, to see if there is any error

[musicmaster]

Look also in your browser console for javascript errors

[PeterPan]

Fortunately, I had a backup and restored it.
When I have more time, I will update again and then work through your tips.

Thanks so far!