PC had wrong date on and now by Total Security says sub has expired
Yesterday I booted up my second PC at a friends house. Immediately BD comes up to say my subscription has expired, which is weird because that PC is one of my 3 devices which in my dashboard (when I log into central) says is protected. It is then that I notice the date and clock on the taskbar is very wrong. It said it as 4th April 2021!! I have no idea why that happened. I've heard of the clock being old before due to CMOS battery but never a future date! Consequently that is why BD now thinks my subscription has expired.
Meanwhile my main PC is fine, protected for 332 days. When I log into central and check my 3 devices they are all protected. But when I boot up that second PC which now has the correct date set BD still says the sub has expired and I don't know what to do. I've tried clicking "I already have a subscription and I want to activate the product" but an error comes up to say "It appears you don't have an active subscription".
Also I can't access the internet on my second PC as login.bitdefender.net denies access to EVERYTHING saying the website has not configured their site properly and clicking Advanced gives me really confusing certificate messages, none of which work. I can't even connect to BitDefender without it saying the website is configred incorrectly. So I can't try entering my activation code!!!