I am having this exact issue. I have a high-end PC. Studio One 4 was working just fine months ago.
I updated the Nvidia driver, but no luck. I downgraded to the driver to when Studio one was working. No luck.
So, thank you for posting this question. I'm also curious about if anyone has the answer. I'm glad to know I'm not the only one with this issue, although I hope we get this fixed fast.