Greetings to those who may read this, as of currently I've been having issues within Trello, they consist of me trying to save a card, but ultimately failing.
For your information, I am using a Proxy (CloudFlare), and yes, I have tried turning it off, but that didn't work either.
I use Trello on a Computer if that's relevant at all, however, I have not tried using Trello on the mobile app.
What might be the answer is that my Board is somehow "Corrupted", as I have been using Markdown without WYSIWYG before the forced roll-out, as if I go on another Board, or create a new Card not from a template, then it'll work.