Blogger Pages gadget not working?

Question

Google Blogger

Blogger Pages gadget not working, what's wrong?
When creating a panel with a page menu in Blogger, after pressing the SAVE button, nothing happens. Everything worked great before. The page navigation panel is not created. When editing previously created panels with page navigation, similar changes do not occur and the SAVE button does not work. When you hover over the save button, the inscription javascript:void(0) pops up.