Can not open excel file on nextcloud 20.0.8

Dear all !
I have an error
I am admin my nextcloud server. I have an error
I can create file doc and open, edit – It’s OK
But I can create file excel and i can’t open it, excel file is grayout color.
My log server
Fatal onlyoffice Config: You do not have enough permissions to view the file

I tried it on another account but it still works like that

Plz help me, Thanks all !