Same here, no internet connection after upgrading from Catalina to Big Sur 11.5.1 Guys from Apple Development, could somebody help, its annoying to make a downgrade to catalina on all 55 corporate devices. SOS.

Hi Apple, what's going on here? Can not be true that such huge BUG can not be fixed immediately... Wanna downgrade to Catalina again and wait for healthy macOS 11.5.1