Cant log in locally more and more often. Keeps asking for my password, which it did not used to do, then loops for a few seconds and takes me back to login screen with the message “There was an error signing in” asking me to login again. Over and over. Please fix this it is annoying!
Don’t use Microsoft Edge to access a Plex server in your local network. It won’t work. It has an inbuilt ‘DNS rebinding protection’ which misfires with Plex’s particular way of using the DNS system.
Use Chrome or Firefox.
I have exactly the same issue using Ubuntu 16.04LTS with Firefox 58.