Error:
Lable is not entered. This may not be edited or deleted in the export file.
Explanation:
After export, the translations can be completed and then reimported.
The values in the "Label" column must not be emptied. If this has been done (consciously or unconsciously), this error appears when importing.
Solution:
Create a new export and then leave the "Label" column unchanged. Only change the values in the "Translation" column.
