Won’t let me play a selected friend



I had the same issue and this is how I worked around it.
On the homepage click "more"
Select "friends"
Then "send challenge link"
"create link"
"copy link"
After you've copied the link go back to your "friends list"
Click the toggle button on the friend you want to challenge and click "send message"
Paste the link send the message and when they click on it you should be able to play.