V12.2.2
If you click on "Planning" and the "Planning" is loaded, but not jet a porject is selected in the displayed screen and you click the "Show data in clobal currency" button in the top menu, then the ERROR : Class " not found apears

Same in "Planning & Work Plan"

This seams to be the case for all Gant views , which contains project information.
In case of all other views like ticket, activities meetings etc. a click on the "Show data in clobal currency" has the same effect like the "Creat new ..." button (new element is shown)