Basically if I run
wg-quick up wgcf-profile.conf
I have no internet access, pings fail, but somehow telegram works.
In the version without this revert commit , I had no internet at all, even in telegram. Only now when I updated to the version with this commit I find this irregularity. The same conf on other clients like android and windows work just fine.
I'm on Pop!OS 20.10, which is based on Ubuntu 20.10
Any idea what could be the problem?

Edit from maintainer (09/11/2022):

Just to give some organization to all the "internet does not work" reports. There are two known cases when this may happen:

1. If the WireGuard tunnel works on your other computer/phone, but not on this one, then it's likely an issue with your system configuration. It's generally not something I can help with, as wgcf is only responsible for providing you with a WireGuard profile, but leaving this issue open for people to share their experiences and solutions. This is tracked in Internet access does not work (system issue) #50.
2. If the WireGuard tunnel does not work on any of your devices, but the official client does, then this is likely an issue with your region being restricted due to abuse prevention. There is no solution to this problem, maybe hope that people stop abusing the service so the regions are unlocked. Use the official client in this case. This is tracked in Internet access does not work (abuse prevention) #158.

Edit from maintainer (26/11/2022):

Some more advise can be found here: #50 (comment)