Thanks for reporting this issue! The Motion Graphics team believes that this bug is fixed with the latest beta build (24.3x36). It would be immensly helpful to us if you could check if the problem has in fact been resolved on your end.
I am on latest 24.3 Premiere Pro Beta and was able to use Essential Graphics panel. Can you share more information on
you system, are you experiencing this on a specific project, what version are you running in Premiere Pro (shows on the About box), what language is your Operating system & Premiere Pro operating language.