Welcome @FutureFlash 
I had a similar issue with my SSL certificate expiring. I ended up renewing it two weeks before it expired since I didn’t know how long it might take, or how soon it would be valid, see my post here Renewing expired free SSL certificate
https://infinityfree.net/support/cannot-use-or-have-problems-using-lets-encrypt-or-sslforfreecom/
https://infinityfree.net/support/how-to-install-an-ssl-certificate/