"All TAP-Windows adapters on this system are currently in use": cannot establish connections

[wyrv9 0]

My client (v 2.10.3, Windows 8.1 64-bit) has been working fine the last few days. I left it on overnight. However, when I checked on it this morning, it was in a never-ending loop of disconnecting and reconnecting. The error message I keep getting in the logs is 

All TAP-Windows adapters on this system are currently in use.

After looking it up, and looking for the other answers to this issue, I still can't find what that means and how to fix it. Any help is appreciated. Thanks!

[grecuscatopulusmopulus 0]

Same story here: It works for two days then fails. Usually as night. It happening 3 weeks in a row. Machine reboot fixes the situation.  

Windows 7 64x, AirVPN 2.10.3 Same symptoms on workstation and laptop.