Can't register account on Softphones

I’m trying to setup any softphone with my account. Tried MicroSIP and Linphone following Voip.ms guides but the result is the same, no connection. I have enabled encryption and followed the steps to change the settings both on voip.ms account and specific softphone.

What it the most common issue for this not to work according to what other people have reported?
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On MicroSIP I get “service unavailable”. I changed the password for MAIN SIP but still nothing.

Update: OK, I figured out the issue … VPN

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