Since upgrading from Django 2.1 to 3, the file field in Django admin is now displaying as "loading".
https://i.sstatic.net/8JDWu.png
An error is appearing in the console.
https://i.sstatic.net/RCgwt.png
https://i.sstatic.net/78YtG.png
Previously, there were no issues with this when it was on version 2.1.