UPD: 😦 It’s not fixed/resolved. I created a new comment to one of issues, received email, then accidentally clicked “Mute” and went to the page.A bit later, checked Notifications page – again the same. But then re-subscribed/watched. Did not help right away.A bit later, refreshed the page – Notifications alive. No idea what is happening.
It’s been a while, since I started seeing warning about errors on Notifications page on GitHub. I was more than sure, it’s due to my huge list of watched repositories. As fallback page on GitHub says, I tweeted to support, but none answered.