[https://sqlshare-test.s.uw.edu/] File upload hangs/fails during "Saving"

[billhowe]

File below uploaded and showed a preview instantly.

But after saving, hung on attached screenshot after 2-3 minutes.

After 25 minutes, the bar had progressed, but it still wasn't finished.

File in question:
http://homes.cs.washington.edu/~billhowe/Frequency.csv