Can't connect my InfinityFree account to my Google account

I would be more surprised if it did work now. As far as I can tell, everything is working correctly on our end and so there is nothing to fix. I do believe you when you say that it’s not working for you. But the one single case I remember where someone reported something similar, it was an issue with their browser configuration, and I have no way to check that. You’ll need to actually do work yourself to get this resolved. We cannot just fix it for you.