Thank you for your post in the Roku Community!
We see that you're having trouble accessing Tubi and we'd like to help.
Before we proceed, can you let us know if this issue is happening on only one channel or on all channels? Also, it would be helpful if you could provide us with the error code and let us know when the issue occurred.
We look forward to hearing from you and looking closely into this issue.
Thanks,
Jharra
Jharra Q.
Roku Community Moderator