Have the same problem, all major browsers on the PC (Windows 10) give me none descriptive error message just saying error occurred if continues contact support . Only way I have been able to get it to work is to use the Native Android browser in Bluestacks (if you don't know what that is, it is an Android phone/tablet emulator). The mobile app is not supported on any of my devices and gets the same error while using it in Bluestaacks.
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