Test plan:
1) Download the file attached to this bug and save it as a .txt file
2) In the ERM module, create a local package
3) Go to the local titles page and click Import from KBART file
4) Select your package and the saved file and click import
5) The import will fail with just a console error
6) Apply patch and run a restart_all and a yarn js:build
7) Repeat step 4, it should now display an error saying the file must be either TSV or CSV
8) Convert the file to either of those two formats and repeat step 4
9) The file should now import successfully, with a message saying that there is an additional column "bestppn" that will not be imported
Signed-off-by: msaby <mathsabypro@gmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
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