Unable to preview REST query

[mslourens]

Describe the bug
I get an error when I try to preview a REST api query.

To Reproduce
Steps to reproduce the behavior:

1. Go to the data tab
2. Click on the Plus button to create a new datasource
3. Select the REST data source
4. Click the Add query button
5. Enter the url of the REST API endpoint
6. Click the Send button to preview the results.
7. Notice the Error message: "Error running query"

Expected behavior
The endpoint the query points to does exist, so I expect it to run and show me the result.

Cause of the issue
The validation of the preview query endpoint is missing three properties:

• name (string)
• flags (object)
• schema (object)

Desktop (please complete the following information):

• OS: MacOS 12.1
• Browser: Vivaldi
• Version: develop branch

Additional context
Add any other context about the problem here.