Here is how to actually fix Sweatcoin ad problem 

So here it is, the actual fix for this issue:
Step 1: Download SecVPN (mostly using it because it's free and doesn't require too much of a hassle setting it up) or any other VPN you may prefer;
Step 2: Go to Settings/Apps/Apps Management, search for Sweatcoin and tap Force Stop (The actual steps may differ on your Device);
Step 3: Open SecVPN or your installed VPN app and select a different Country (In my case USA works);
Step 4: Open Sweatcoin App and happily redeem your rewards!
If this can't fix it you may try switching to other countries until you get one that works just fine for you.

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