Fore query "cannot persist Microsoft authentication token cache securely!" (with quotes) Google returns single result, written in Chinese. Luckily I opened that Chinese result and spotted link to that issue.

duck.com does find the issue at hand.

I mean GitHub is no small site, but somehow I expected that Google will find my ANY public string on the internet.

Not that it doesn't find issues at all - but I stumbled upon this one that got left out.