Check for regular updates works as expected:
Check for alpha updates shows an error:
Seems to work fine here, maybe you tried while the current alpha was not yet uploaded
we're on different running versions, i'm one behind OP, so can’t imagine that upload could be the reason. But I'll manually replace my version to .13 and see what it does.
it can be because the alpha update channel is disabled for a moment when a new version is added
