I suppose i’m not the first one, but with unity 2020.1.0f1, i can’t create or load any new project, each time i try to, it fails and says : 
I already did everything said in the pinned post, with the firewall and the system variable, but nothing.
I tried to uninstall and reinstall unity and unity hub, but still the same error, and I don’t know what to do at this point.
Thank you very much for your help.
6150577–671872–diagnostic_report_30_07_2020_134152,53.txt (1.57 KB)
6150577–671875–upm.log.txt (218 Bytes)