Value cannot be null(Parameter 'source')

I’ve had this problem for couple of hours and couldnt find a solution that worked for me. In the forum the most common answer for this problem were arguments. Through destroying and building again, the team realized that the Remove Duplicates Activity for Excel was the one causing this error. The error stopped appearing once I unchecked the box of Compare Individual Columns and now everything is working smooth.

I am making this post in case someone stumbles upon this same error and it might help him. On the other hand, I post it to see if there is an error with the activity or something that I did wrong on my end. Nevertheless happy automation :slight_smile: