Update to 16.1 Error

Hi, I just updated DaVinci Resolve to Ver. 16.1 and suddenly, I cannot access files to render since the update. Everything else (so far) has worked fine. I can create a new video, edit the files and manipulate everything. Then when I go to render it gives me the attached error. Thinking that it does not have read/write permissions on the file folders, I gave access to ALL instead of just me. It did not fix it.

I really need this to work as I am doing a video for clients...

I've reverted back to 6.0 and it is working fine, so there must be an issue with 6.1 - Whether it is just me or others, remains to be seen. Anyone else seeing this issue?

Haven't seen that yet in Studio 16.1 for Windows.

I neglected to mention I'm using an iMac Air i7, 500GB SSD. 8GB Ram.