Search bar broken on RTD page for valid results

Issue description

The search bar on the RTD page is broken when queried for a valid result (the page seems to block invalid results, e.g., "foobar").

Expected result

One or more results should be returned or a page stating there are no results should be displayed.

Actual result

See the screenshot below.

Steps to Replicate

• Go to the RTD page.
• In the "search the doc" text field, enter in python_version (for example).
• Either press Enter or pick one of the autofilled results.

An example screenshot is included below: