If your FileMaker file crashed, I'm suspecting a damaged FileMaker file. Try the solution on a different computer and see if it has the same problem. If it does then you might have to revert to a backup of your FileMaker file.
You can also try a new file and see if it presents the same issue. If it does have the same issue then the problem is likely the font.
Thanks. Tried new file and it persisted. Will try on a different computer.
Sounds like the font or OS is the issue.