Hi Van Nguyen,
This error does not pertains to one specific area, it could be due to the wrong format of the file chose to upload or due to the incorrect data provided in the file or one of the required field for that data entity used in data management project is not available in the file.
In my case, i was using data entity "Registration numbers" to update Tax Registration Number for customer masters and during import of the data i was getting this error. Upon detailed investigation i got this that i had almost 2500 customer masters and all of the customers had data filled in the field called "Location ID", 3 customers were not having data available in "Location ID" so they are blank in the upload file which was in excel format. Location ID is the mandatory field and if any one don't have location ID for customer / vendor masters then upload in data entity "Registration numbers" wont work.
Finally i removed those three rows of the customers where i did not have location ID and upload worked successfully.
Ideally, i should have the clear message in the execution log, or staging log details areas but somehow nothing was appearing here.
Hope above explanation helps other community members too.
Regards
Muhammad Matloob