Calendar is frozen - calendar will not move month to month

My calnedar is frozen. On the left side is the month of October 2026. I click on the arrow to move to Novemebr or September nothing happens. I can not enter new reminders in any date due to no dates appear. In the centre and to the right. I have a white screen. No dates. My calendar is set for Weekly. At the top menu bar i see "events in Next 7 days" and the menu bar shows "Title Start End Category" below this menu bar is a white screen. What have I done to create this situation ans what do I do to fix it (get my weekly calendat back nd be able to enter reminders).