Hello!
I'd love to help you but I'm going to need just a little bit more
information.
This is the backtrace I was able to pull out of your report:
org--warnings '("org-element--cache: Org parser error in math.org::453519.
Resetting.
The error was: (wrong-type-argument integer-or-marker-p nil)
Backtrace:
backtrace-to-string(nil)
org-element-at-point()
org-element-context()
org-fragtog--cursor-frag()
org-fragtog--post-cmd()
The first thing I'd like to know is what the contents of the file near
where the warning occured. So the content near math.org::453519
You can get to that buffer position using `goto-char'. So you can type
"M-g c 453519" or use "M-x goto-char".
I'm also not familiar with fragtog which seems to be the origin of the
error. It is possible this is a bug on their end.
Morgan