I'm on localhost, trying to test node sharing. I get this error:

UnknownServerError: {"data":"Violated: Couldn't construct a valid share URL from 'http://localhost:8008:8008/#/share/NodeCorpus/88'","diagnostic":"A validation error occurred","type":"EC_400__validation_error"}

This is a bit delicate, as it seems (from G.A.N.ShareURL) that for localhost, the url part is glued to the port part. However, the full URL (with port I think) seems also to be used in emails. So when fixing this, make sure email is not broken.