I have been unable to connect my Roku to wireless all of a sudden despite nothing moving around. The wireless in the house works fine since cell phones and my laptop are connected with no issue.
I have even gone and bought a new Roku to see if that was the issue but the same thing happens.
I have tried all the restarts of the Roku and router several times to no avail.
If you have a dual channel router run the Roku on the 5hz. Or consider getting a router with 5hz