Getting Fatal Error: Uncaught Error

Fatal error: Uncaught Error: Class ‘MLAQuery’ not found in ../wp-content/plugins/media-library-assistant/includes/class-mla-data.php:25 Stack trace: #0 ../wp-content/plugins/media-library-assistant/includes/class-mla-core.php(445): MLAData::initialize() #1 ../wp-includes/class-wp-hook.php(298): MLACore::mla_media_view_settings_filter(Array, NULL) #2 ../wp-includes/plugin.php(203): WP_Hook->apply_filters(Array, Array) #3 ../wp-includes/media.php(3618): apply_filters(‘media_view_sett…’, Array, NULL) #4 ../plugins/design-approval-system/includes/das-create-new-design-post-shortcode.php(5): wp_enqueue_media() #5 ../wp-includes/class-wp-hook.php(298): das_create_new_design_head(”) #6 ../public_html/wp-includes/class-wp-hook.php(323): in ../public_html/wp-content/plugins/media-library-assistant/includes/class-mla-data.php on line 25

Have had to deactivate the plugin to get my site working again.