Inject missing renderer service in Controller

Problem/Motivation

Service Renderer is missing from Controllers

The website encountered an unexpected error. Please try again later.
Error: Call to a member function render() on null in Drupal\view_custom_table\Controller\OwnTableList->content() (line 99 of modules/contrib/view_custom_table/src/Controller/OwnTableList.php).

Proposed resolution

Inject the renderer service in the controllers

Remaining tasks

Review the code.

User interface changes

None

API changes

None

Data model changes

None