SDK internal error on auth

I tried to get started with zoom desktop SDK and I got SDKERR_INTELNAL_ERROR response every time when I called m_AuthSDKWorkFlow.Auth(param).
I tried c++ and c# versions - result the same.
What is wrong?

Version
v5.0.24433.0616
zoom-sdk-windows-master\demo\sdk_demo_v2\sdk_demo_v2_2017.sln

To Reproduce
1 On the first form press button “SetDomain”. “https://zoom.us” in the field
2 On the second form enter JWT Token in the field and press “Auth”
I got error “auth sdk failed”. In the debugged I can see it is SDKError::SDKERR_INTELNAL_ERROR(15)

logs