I faced the same problem recently even am not resident of one of the restricted countries. I was suggested to clean the cookies from of my browser and it worked well.
If you are from a banned country, you may just use a VPN, then you are good to go. Many people confirmed that they are using this method but am not sure if they really got paid for posting.
I haven't cared for that forum for a long time since long before users from my country were banned there I only saw developments. and in the end, the IP for my country was banned since then I no longer visited it.
there was even a colleague from my country who tried to use a VPN but that could not change as before, because the yobit account where the payment of 1000 sat was also banned.