OnlyOffice with Community Document Server


I use OnlyOffice in nexcloud, I installed Community Document Server and OnlyOffice in version 25.0.3, and when I create a spreadsheet (xlsx file) in Nexcloud I can put the data and work normally, but when I upload files or access through a cloud mapping, the file has no content, empty file, I can only see the content inserted in the spreadsheets only within the nextcloud access with Onlyoffice, but opening with excel on the computer or the file shows no content, does anyone know how to solve this problem?