Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
Did you subscribe directly to AMC Plus? Or did you subscribe through The Roku Channel?
If you subscribed through The Roku Channel, it shouldn't be asking you for your email/password from within the Roku Channel. That would be something the standalone AMC Plus app would do, and a subscription through The Roku Channel won't work on the standalone app; you have to watch from within The Roku Channel app.
DBDukes Roku Community Streaming Expert Note: I am not a Roku employee.
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This is a problem with AMC Plus programming , you're doing nothing wrong! I would remove AMC Plus as there are better movie programs such as TUBI, Peacock and Pluto, just to mention a few.
TUBI has tons of movie categories, probably more that any other program. Also, AMC advertises that they are " FREE" on ROKU, NOT SO! They have a monthly fee but advertise they are free on ROKU! I had AMC. Plus for about 60 seconds and when I found out these things, I removed AMC Plus and it will stay off my TV for good! Thanks and I hope you follow my drift.
For more information about that channel's features and functionality, you'll want to contact the channel provider support directly to inquire further. Many channels on Roku are developed and maintained by the channel provider themselves.