Observed behavior (please include a screenshot if possible)

User is not able to ave general feed info after editing
An error message is shown on saving the changes, and the changes are not saved:

An error was encountered while trying to save to the database

The following field(s) are missing from JSON feed_info object: [default_lang]Network error (500)!

(put request on /api/editor/secure/feedinfo/2?feedId=094ae2cd-48f3-4a2e-ae68-a2dca973eb3d&sessionId=node01loyx26wrkfw39mhhvlmre1h3)```

Other fields may appear in the list such as default_lang, feed_contact_email, feed_contact_url if they are not provided.

Expected behavior

Changes should be saved and no error message should be shown.

Steps to reproduce the problem

1. Modify general feed info (e.g. the agency name, url) in the GTFS Editor
2. Click Save
3. The error message above is shown.

Any special notes on configuration used

NA

Version of datatools-ui and datatools-server if applicable (exact commit hash or branch name)

• backend: ibi-group/datatools-server@149bc4a or later
• frontend: any current commit.