TinyMCE won't load on Text_Editor_Custom_Control

[dbhynds]

I've added a Text_Editor_Custom_Control to my Customizer using the code below. When I navigate to that section in the Customizer, the field appears with the "Add Media" button plus the "Visual" and "Text" tabs. However, the TinyMCE editor doesn't load. It doesn't add the editor buttons, and the input element itself remains a textarea, instead of being replaced by the iframe. There are no js errors in the console, nor are there any PHP errors (WP_DEBUG is set to 'true').

  $wp_customize->add_section( 'repeated_content' , array(
      'title'      => __( 'Repeated Content', 'sage' ),
  ) );
  $wp_customize->add_setting( 'scholarships' , array(
      'default'     => '',
      'transport'   => 'refresh',
  ) );
  $wp_customize->add_control( new Text_Editor_Custom_Control( $wp_customize, 'scholarships', array(
    'label'      => __( 'Scholarships', 'sage' ),
    'section'    => 'repeated_content',
    'settings'   => 'scholarships',
  ) ) );

[Tomgroot]

Have a look at: https://gist.github.com/Tabrisrp/13348dbcd2bbb0d9406f