I was gifted a Roku Ultra a few months back and finally got around to setting it up. Each time I try to sign in to Plex using either my user name or email it tells me that it couldn't authenticate the user. I have an Nvidia Shield Pro in another location and Plex works fine there. As well I am still able to connect to the web app on my computer and using the app on my phone.
I could desperately use some suggestions.
TIA
The Plex webapp also seems to recognize that the Roku Ultra exists, but tells me I can't stream content to the connected player when I try to cast to it. This works on the Shield.
If no one here can help, you might have better luck in the Plex forums:
There are two effing tilde options in the special character entry!!!!!! And they aren't beside each other! I only discovered the second one while I was sitting closer to the tv and being frustrated about this. One tilde sits high, and the other one is centred, top to bottom. Was able to login now.