Missing Experience Bar

My experience bar is missing on one of my level 80 toons. I’m not sure if there’s a questline required for further leveling of her at this point that I missed or simply an in-game setting. She leveled just fine before I hit 80 on her and the xp bar was there.
Any help would be appreciated especially the name of quest and where to get it if the case. TY in advance for any and all help on this

If you have a reputation being tracked, it now seems to over write the xp bar. Unless you actively turned off xp on that toon, in which case you’ll need to find the person in your capital to turn it back on. You might have been wanting to use that toon for a Herald of the Titans run so you may have capped at 80.