Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index

Hello
When i expert a report in excel it gives me this errror: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index

It is so strange to me, the report itself is fine, it works with my old database, but recently i upgraded to a cloud solution and it gave the above error. All other reports work but this.

Any suggestion?