Are you using your Telus Account login or the Optik account login? There are two different logins/passwords and only the Optik one works.
The Optik app usually gives you a choice of using the Telus account login or the Optik one. The Telus one will work with the Optik app only. The Optik account is the one you set up on your PVR and the only one I've been using to access Global / CTV / Crave
See Optik account instructions: https://www.telus.com/en/bc/support/article/set-up-optik-tv-account