Error displaying section in Revit

[alladinbmt]

Section` icon has error displaying as below image,the other sheet is ok just 1 sheet has this problem,pls help me how to fix,thanks. 😅

[barthbradley]

What's wrong with it?  It's displaying fine. You need to check a box for an elevation view to be created, and when that elevation view is placed on sheet, the question mark will change.  

[alladinbmt]

I still dont know how to fix this T_T
It was like this images before,and somehow it became like that

[alladinbmt]