EX2 ultra on OS5 can't activate cloud access through dashboard

Please help!
Windows is updated.
I can see the device in Explorer.
I did system only restore. Did not help.
I can log in to my cloud through web but “there is no compatible NAS”

I am having the same problem
after update to OS5, i can’t active the cloud access… Same error above… How to resolve this issue?

I solved the problem. Changed network and router setting multiple times. Finally it worked. But to be frank I do not remember exactly which settings I changed to make it work. Sorry. At least you know where to make changes. Good luck.