FONTS SUDDENLY MISSING IN PREMIERE

I've downloaded the STIX font family from the Creative Cloud and used it in several videos within Premiere Pro. Suddenly today, it was missing and being replaced with a different font. I double checked on the Creative Cloud and the STIX family was all still 'active'. I tried deactivating them and got the notifications on my system before re-activating them and that didn't work. Another problem is when I select the fonts in the timline to adjust them, not uptions appear in the Essential Graphics window. It will not let me even change the font. Of course I've tried restarting my system and don't have any overdue updates on Premiere. Any suggestions out there?? Thank you!