Hello, I have reinstalled MacOS 11.1 Big Sur and Parallels Desktop. But unfortunately no network for Parallels Desktop. With other software no issues, connect to internet download updates etc. Interesting is that Parallels Desktop let you activate product.
same issue today on Catalina. Network did work at one time but today when I fired it up no network on the guest os and i can not check for software updates for the paralles app itself.