The WordPress plugin had been installed on my website for some time now, and for some unknown reason it become completely incompatible with my wordpress thingie. My stie could not be access for over a week - this happened twice actually - and today I deactivated each plugin, and it was with the Patreon plugin deactivated that things came back. Just to let others know.
It actually doesn’t bother me too much because I have manual Patreon links everywhere on my site, with icons, and they all work fine.