I have this problem too, used it on different computers with different ISPs, still the same: "not ready, check your connection".
hope they have the decency not to block us because of the sanctions on the goverment.
Tried it with older versions but not connected.
But 2 of my pcs are still connected they use 11 version. They use same ISP!
I am from iran too and I have got the same problem starting today.
All of my Remote computers are now inaccessible....!!!!
Could anyone from teamviewer answer this thread?