Check the menu settings and page/section properties: "Settings > System Settings > Module Settings > Site Explorer", select the Settings tab, scroll to Website Settings group.

1. A menu must have a clear, comprehensive and distinctive name, for example: "Main Menu", "Left Menu". "Menu 1" is what you should not call your menus.
2. A property type must have a clear, comprehensive and distinctive name, for example: "Description", "Keyword". "Prop1" is a good example of a bad, confusing property type name.

It is recommended that you use the standard cached components - "bitrix:menu" because they are well optimized for stress load and can be easily updated: