I have Avast VPN on my PC. I also downloaded it (on the same account) to my phone. That done, my VPN on the PC suddenly was stopped; the Avast app says that my license no longer is valid, and that I should renew it. I then looked up my different licenses, and found the VPN license in the list, and it is valid. What has happened, and what should I do to get it functioning on both PC and phone?