unable to use 2nd tab of dataset dialog, upload and paste fail

[Stephen-McDaniel]

Please:

• [X ] Check for duplicate issues

DONE

• [X ] Describe how to reproduce the bug / the goal of the new feature request

Common export date formats cause failure.
Message is "Cannot read property 'Close' of undefined".
I understand this is simplistic attempts at import using standard JS.

May I suggest an CSV parser with 4000+ stars?
https://github.com/mholt/PapaParse
MIT Licensed

I have used it with solid results.

• [X ] Provide an example spec in JSON and, if applicable, screenshots or GIF videos (e.g., using https://www.cockos.com/licecap/)

Uploaded sample CSV
back_for10M.csv.zip