Exporting Data from Published Report

HI ashwani_pal,

I'm not so sure why export feature not works on your side, have you try to create new report with current datasource?

In addition, you can also take a look at limitations of export feature:

Limitations and considerations

The maximum number of rows that can be exported from Power BI Desktop and Power BI service to .csv is 30,000.
The maximum number of rows that can be exported to .xlsx when in the Power BI service is 150,000 for Pro users and 30,000 for Free users.
When using DirectQuery, the maximum amount of data that can be exported is 16 MB. This may result in exporting less than the maximum number of rows, especially if there are many columns, data that is difficult to compress, and other factors that increase file size and decrease number of rows exported.
Power BI only supports export in visuals that use basic aggregates. Export is not available for visuals using model or report measures.
Custom visuals, and R visuals, are not currently supported.
Export data is not available for users outside of your organization who are using a dashboard that has been shared with them.
If there is unicode character in the .csv file, the text in Excel may not display properly. Although, opening it in Notepad will work fine. Examples of unicode characters are currency symbols and foreign words. The workaround for this is to import the csv into Excel, instead of opening the csv directly.

Regards,

Xiaoxin Sheng