The only difference with my situation is that it is a Hero 7 Black.
I have the same problem. Hero 7 Black connects to gopro app just fine but the Myk app will not connect wifi. WE NEED A SOLUTION!!! I am using Android phone.
did anyone resolve this issue?
Support has not even acknowledged the issue or even responded yet. That is shitty.
Unfortunately I purchased lifetime licence and suffer the same problem of not being able to connect to WiFi despite many attempts of refreshing WiFi etc. After a search on the internet no one has a fix.