Fatal error: Class WP_Customize_Image_Control not found

Solved by adding use WP_Customize_Image_Control; to inc\Customizer\FeaturedCategories.php:

namespace Ivana\Api\Customizer;

    use WP_Customize_Image_Control;
use Ivana\Helpers;

class FeaturedCategories
{
    public function register( $wp_customize )
    {
        $this->add_panels( $wp_customize );
        $this->add_sections( $wp_customize );
        $this->add_settings( $wp_customize );
        $this->add_controls( $wp_customize );
    }

    public function add_panels( $wp_customize )
    {
        $wp_customize->add_panel( 'featured_categories', [
            'title' => 'Featured Categories',
            'description' => 'I\'m looking for a lady',
            'priority' => 100
        ] );
    }

    public function add_sections( $wp_customize )
    {
        $wp_customize->add_section( 'featured_category_0', [
            'title' => 'Featured Category 1',
            'panel' => 'featured_categories',
            'description' => 'Highlight categories on your front page.'
        ] );

        $wp_customize->add_section( 'featured_category_1', [
            'title' => 'Featured Category 2',
            'panel' => 'featured_categories',
            'description' => 'Highlight categories on your front page.'
        ] );

        $wp_customize->add_section( 'featured_category_2', [
            'title' => 'Featured Category 3',
            'panel' => 'featured_categories',
            'description' => 'Highlight categories on your front page.'
        ] );
    }

    public function add_settings( $wp_customize )
    {
        $wp_customize->add_setting( 'category_slug_0', [
            'default' => '',
            'transport' => 'postMessage',
            'sanitize_callback' => 'wp_filter_nohtml_kses'
        ] );

        $wp_customize->add_setting( 'category_slug_1', [
            'default' => '',
            'transport' => 'postMessage',
            'sanitize_callback' => 'wp_filter_nohtml_kses'
        ] );

        $wp_customize->add_setting( 'category_slug_2', [
            'default' => '',
            'transport' => 'postMessage',
            'sanitize_callback' => 'wp_filter_nohtml_kses'
        ] );

        $wp_customize->add_setting( 'category_image_0', [
            'default' => '',
            'transport' => 'postMessage',
            'sanitize_callback' => 'wp_filter_nohtml_kses'
        ] );

        $wp_customize->add_setting( 'category_image_1', [
            'default' => '',
            'transport' => 'postMessage',
            'sanitize_callback' => 'wp_filter_nohtml_kses'
        ] );

        $wp_customize->add_setting( 'category_image_2', [
            'default' => '',
            'transport' => 'postMessage',
            'sanitize_callback' => 'wp_filter_nohtml_kses'
        ] );
    }

    public function add_controls( $wp_customize )
    {
        $wp_customize->add_control( 'category_slug_2', [
            'section' => 'featured_category_0',
            'label' => 'Category slug',
            // 'description' => 'Not the animal',
            'type' => 'text'
        ] );

        $wp_customize->add_control( 'category_slug_1', [
            'section' => 'featured_category_1',
            'label' => 'Category slug',
            // 'description' => 'Not the animal',
            'type' => 'text'
        ] );

        $wp_customize->add_control( 'category_slug_0', [
            'section' => 'featured_category_2',
            'label' => 'Category slug',
            // 'description' => 'Not the animal',
            'type' => 'text'
        ] );

        $wp_customize->add_control( new WP_Customize_Image_Control( $wp_customize, 'category_image_2', [
            'section' => 'featured_category_0',
            'label' => 'Featured Category Image 1'
        ] ) );
    }
}

I found the solution by copying and pasting the Customizer classes from the source code of the mentioned theme (AWPS): https://github.com/Alecaddd/awps/blob/master/inc/Api/Customizer/Footer.php