Data Gateway Refresh Issue - All Values are Blank

[Anonymous]

Hi everyone,

I connected my data sources to Data Gateway. When I refresh the datasource, there is not any failure. Refreshing is successful. However, when I return to the report, all of my values are blanks. I don't know even what is the problem in here. Do you have any idea?

All of my data sources are Excel file.

@GilbertQ have you ever seen this situation before?