First off, please make sure you have the latest updates. Before installing, uninstall the previous versions with the Uninstaller in:
C:\Program Files\MasteringTheMix (Windows)
Applications/MasteringTheMix (macOS)
The latest installers are here:
Windows Only
If this still doesn't fix the issue please make sure that you have the latest drivers installed for your ethernet, WiFi or even Xbox adapters.
For initial authorisation try enabling all adapters in Windows. After authorisation you can then disable the adapters you no longer wish to use or ideally put them into "Airplane Mode" (for WiFi).
If the issue still persists please do the following:
Open a PowerShell command prompt (which is different to the "cmd" prompt), and run the following command:
Get-WmiObject -Class "Win32_NetworkAdapter" | Format-List -Property Name,PhysicalAdapter,MacAddress
then hit Enter.
Check through the listed adapters, if you have your Wi-Fi or Ethernet adapter listed along with:
PhysicalAdapter : False
or the MacAddress field is empty
MacAddress :
then please completely remove and uninstall that adapter, reboot and re-install. Then make sure it is enabled. (Again you can put the WiFi adapter in "Airplane Mode" if you do not want an internet connection.)
Alternatively, if you do not need the adapter then uninstall the device from Device Manager, then try to authorise again. No reboot required.
If there is still an issue please run the following command, again in PowerShell:
Get-WMIObject MSFT_NetAdapter -Namespace root\StandardCimv2
Copy and paste the output of that and then send to our help desk: