OB black screen Windows 11 issue

Hi - I’m having an issue where Overbridge window is completely blank, the interface flashes up briefly then disapears. I’m using the latest version of OB (2.7.13), latest OS on my Rytm mk1 (1.70) but that doesn’t matter as OB has a blank window even if the Rytm is unplugged.

I have put a support ticket in - is anyone experiencing this?