Hi All,

I created aura component to display open activity records and to download all the records in the component using custom button (export to csv). For calling aura component as button I created vf page with lightning outapp. 
When I am previewing the vf page on console its displaying the related records and downloading record in csv format(which is perfectly fine).

Problem: But when I am adding button on related list of open activities its showing the related records but not downloading in csv format. Its downloading in some unformatted file format and not able to see any records.

Kindly provide the suggestions. I am stuck with that I checked lots of link but nothing helpful.

Thanks in advance.