Comentario oficial
This is almost universally caused by improper CSV file formatting. Open the file in a plain text editor and make sure there are no weird characters. Make sure the column labels match the example exactly. Make sure the LAT and LONG are not backwards (happens all the time).
https://support.dronesmadeeasy.com/hc/en-us/community/posts/360055261612-Ground-Control-Points-
If you are still having trouble please email the file to mapping@dronesmadeeasy.com so we can take a look at it.