Whatever post you were replying to did not get carried along with your post, so we don't know details of that "same issue" you are replying to.
Where are you located?
The US version of the Hayu "Ways to Watch" page only shows links to iOS (Apple) and Android versions of their app, no Roku version.
If there was once a Hayu app available for Roku, it may have been withdrawn, as a search for Hayu in the Roku US Channel store comes up empty.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Ultra 4800 | Streaming Stick 4K+ 3821 | TCL Roku TV 43S245/C107X