You can pay to auto renew a paid certificate, but you still have to update the appropriate web services with said certificate.
Beginning in September 2020, SSL certs are only allowed to last 398 days. Often companies were taking out 3-5 yr certs and thought they would be good for that period of time, but browsers will not accept it neither.
That said, if you look at the certificate, it is as mentioned by beardedGTI, a free 'Let's Encrypt' certificate - so first step would be for someone to work on putting reminders in their calendar, because regardless you are going to need to renew them.
Before we get all worked up, I am sure this site is a hobby and not a mission critical site. What do you expect you are getting from a free service / site?