I noticed today that Bitdefender on both my iMac and MacBook was showing as 'Product Expired' - it's only been 8 months after I installed it and bought a subscription. Contacted support who were not helpful - agent tried to say that my Mac password was incorrect and that I should contact Apple. When I tried to explain that my Mac password was fine, he just responded by saying that they can't help with Mac passwords.
I desperation, I deleted and reinstalled Bitdefender on both machines. Seems to be working on my Mac, but when I restarted by MacBook earlier, the same problem came back and Bitdefender was showing as 'Product Expired' and I was unable to run a scan. I made sure required permissions were granted in System Preferences - they were. Restarted my MacBook again, and now it's working.
I'm wondering if there has been a 'buggy' update applied. Has anyone else seen this problem? Tech support were totally unhelpful.