TypeError: Cannot access offset of type string on string in Drupal\\search_api\\Plugin\\views\\row\\SearchApiRow->render() L221.

Problem/Motivation

If we use in our Drupal search custom datasources, those may have no view modes so in the line https://git.drupalcode.org/project/search_api/-/blob/8.x-1.38/src/Plugin... it will throw a TypeError: Cannot access offset of type string on string

Steps to reproduce

Use a custom datasource within a Search view.

Proposed resolution

Ensure that the datasource config is an array to prevent the type error.