This doesn't fix the issues with importing DWG/DXF in the latest version of Illustrator.
I'm on a Mac running OS 11.2.1 BigSur with Illustrator 25.2. Everything worked just fine with the previous version(s) but now I can't import or place DWG / DXF files anymore. I tried saving the DWG/DXF in different versions without any luck. Please fix asap! I use this function daily as I'm sure many others do.