Yeah there are some issues. PR is stuck at "Checking for the ability to merge automatically..."
By accident I landed on https://us.githubstatus.com/ and everything was green. At first, I thought, yeah sure, just report green, then I realized "GitHub Enterprise Cloud" in the title. There is also a EU mirror: https://eu.githubstatus.com
Edit:
The report just updated with the following interesting bit.
> We identified a faulty network component and have removed it from the infrastructure. Recovery has started and we expect full recovery shortly.