I cannot get past this error when I try to open notation.

"PGMusic F Regular (PGMUS.TTF) font not found. Notation will not display properly without this font."

I've verified that all of the PGMusic fonts are installed in Macintosh HD>Library>Fonts. I've reinstalled BIAB 2018 and restarted, but still get the same error. What am I doing wrong? I'm running a Macbook Pro with OS High Sierra 10.13.6. Thanks for any help!