[Can't check out. Get "Your connection is not private"]

No I haven't mate, if I get a response I will post it here. Good to see I'm not the only one with the problem... 

[Can't check out. Get "Your connection is not private"]

Hi,

When I try and buy CM Final Blitz, after I hit "proceed to checkout", I get the "Your connection is not private".

I looked online and the most common reason is your date is incorrect, however I've tried the following to no avail:
- Windows clock is correct;
- BIOS clock is correct;
- Disabled anti virus;
- Tried both Chrome and Firefox;
- Chrome using incognito mode
- Tried checking out with other websites and it was fine;
- Using my laptop (however on the same network)
- Using Chrome on my android phone (using my data plan, therefore different network)

Firefox said there was an issue with the Battlefront certificate?

I don't think the issue is with me given all the steps I've taken above? Take my money please???

Thanks