I'm not entirely sure if this is a general issue, or if there's some conflict with my config. I'm pretty new to emacs, so I'm stumped when trying to unravel what is happening myself. I do have experience in software, just not with emacs - so even a nudge in the right direction would be appreciated.

org-fc has worked just fine for me before. I use doom-emacs and upgraded my packages yesterday for the first time in a while, so it's possible org-fc or some conflicting package was upgraded then, triggering this issue.

running org-fc-review-all takes me to a buffer with a flashcard, but it does not narrow the buffer to the card. The point remains near the top of the file (though not always at the top - I'm not sure if this is important). An error org-fc-review-next-card: Wrong type argument: characterp, nil is thrown. I tried to look at the source, and it looks like this function is happy to receive nil so I assume the error is coming from inside this function.

opening the org-fc-dashboard works fine and it seems to be up to date. Starting a review in the dashboard takes me to the first card and allows me to flip and review that card, but when it tries to take me to the card after that I get the same behaviour as described above for org-fc-review-all