I have a Roku Ultra Model 4670X
Netflix works, YouTube works, HBO Max, Disney+ and Amazon Prime do not.
HBOMax loads slowly, then when I select a show it acts like it is about to load and then boots me back to the show selection screen, Disney+ tries to load but never does and it finally says check internet connection, Amazon Prime gives me a message first in German, then Japanese (I assume) and finally in English asking me to check my internet connection. Obviously the internet connection isn't an issue since Netflix and YouTube work.
I restarted the Roku, I deleted the HBOMax app, neither helped, I unplugged the Roku and restarted that way--no help there either. Everything worked fine last night, I see there was an update as of this morning and it's now a mess.
My Network signal strength is "Excellent" my Internet Download speed is "Good"