CMS Style Generator broken
 

Recentaly upgraded to 4.0.5
When I try to save a style in the Style Generator it just seems to reload the page and does not save.

I have tried every possible config for parent/child/no parent/can choose can't choose etc.....

also the buttons for fine tune white, grey, dark also do nothing
Am I missing a step(s) somewhere?

Please help

Thank you.