Win11, Taskbar Resize. You have to Activate Let Start11 to change size to small or large error, Product is aktivated ???

Win11 22H2 v22621. I get an error Message in Start11 when i try to change the size of the taskbar from medium to small. It says i have to activate Start11. It is already activated. It keeps throwing this error every time i try to change the size of the taskbar from medium. Can someone help ? I also do not understand the message " This function requires a n Explorer restart and a enhanced Taskbar" i dont understand what i have to set and where in order to make this work.