As outlined on the tails website -clearnet link-
If you upgraded Tails 3.0 to 3.0.1 with an automatic upgrade you most likely are experiencing problems, one of the most serious being that Tor does not work which makes most Internet activity impossible.
If you are affected you can repair your Tails 3.0.1 by doing a manual upgrade to 3.0.1.
I searched for an update post on /r/darknetmarkets but wasn't able to find anything and figured some people may have a use for this information.