I know this probably isn't the best place for a bug report/help request, but this seems cool, and the alternative to asking here, now, realistically is that I just forget about this

I'm trying howm on emacs 29.4

I try (with my config and also with emacs -Q)

  (use-package howm)

I enter `C-c , ,` I see the howm-memu pop up, but it's all plaintext with no font highlighting/decoration/"links" or anything, and I get in the Messages log:

  font-lock-fontify-keywords-region: Symbol’s function definition is void: nil
  Error during redisplay: (jit-lock-function 5328) signaled (void-function nil)

Is this familiar to anyone?