why chipmixer representative didnt tell anything here?

is chipmixer closing
Do you try to get a problem fixed or you want to create panic?! Asking same question on every corner will get you nothing new.
Chill. Keep in mind that it's week-end and also holiday season. Also, as said, Tor is in trouble itself...
I'd say you should wait until the new week starts...
PS. If it helps, I've reproduced your first error both yesterday and today.