I am uploading a CSV using the suggested format to populate a drop-down ticket field but am having isues. After selecting the CSV file, I click the upload button and get a 'something went wrong' error message. I notice there is a javascript error in the console. Screenshots below.

Here is a Gist of the CSV I am attempting to upload. https://gist.github.com/ryan-dutton/857ed99e5b4644733bd8789dfcaeec89#file-zendesk_ticket_field_cf_country_list-csv

Any help appreciated, is it the format? Ideally, I'd like to not type in 250+ values :)