Blank plugin window for loopmix

when I insert loop mix. vst3 or au on instrument track. the plugin window is blank.
The standalone app does not work either.

DAW - studio one - 6 - pro
Mac 10.14 Mojave

Hi alpears,
Thanks for the screenshot. Wow, This is really strange.

Can you please tell me which device model/make are you using?
We need to run some tests to see what is causing this, meanwhile we’re happy to refund your order until we find out, so please reach out to us here: https://audiomodern.zendesk.com/hc/en-us

Hi, I am happy to wait to see if you can find a solution before a refund.

I have all your plugins and they all work on this system, so this is a strange one.

I have included a screenshot of my system.

hope you can sort the problem. :+1: