I have an import activity which fetches the file from MArketing cloud FTP and updates the All Subscriber List(also tried to update/add/overwrite All Subscribers List and a test Data Extention as well).
The file is created sucessfully on the FTP before the import activity is run but when we run the import activity, it runs sucessfully but does not update/add/overwrite the All Subscribers List or the Test Data Extention.
How to solve this issue as we cannot debug anything on the UI and the import activity is running Sucessfully.