I was having the SAME issue to my man! But found the solution!
Open the app on your Roku. Go to the settings icon (the gear). Instead of selecting “SIGN IN” under “Account”, go to the next heading underneath it, “Provider”.
Click it, and it will send you to the page where an activation code presents itself. Plug in your cable provider’s info and the activation code and BAM! Should work! Don’t know why the “SIGN IN” is everywhere. I was about to give up myself.
Hope this works for ya!
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