I don't... When it comes to Gnome and Gnome-extensions, I am the weakest link.
I do know that others have asked about this particular extension, before.
The page for DPT states "May be incompatible with some extensions that make extensive changes to the panel." Zorin OS does have quite a lot of Panel gnome-extensions...
In Gnome Tweaks, a person might try disabling all Gnome Extensions.
Then enable Dynamic Panel... Then enable each extension one-by-one until the Dynamic panel breaks, narrowing down which extension is causing DPT to not work...





