Disable plugin on Specific Page of Admin

I have tested Plugin Organizer but I found it difficult to use.

In replacement I found Freesoul Deactivate Plugins which have a really nice and simple UI and works perfectly well.

That's pretty easy.

Remember, I don't know exactly what's the plugin's file name and directory, and the following code was not tested.

Put this to the functions.php or create a small plugin.

<?php
add_filter( 'option_active_plugins', 'wpse264498_deactivate_fat_gallery' );

function wpse264498_deactivate_fat_gallery($plugins){

    // check if you are on the certain page
    global $pagenow;
    if( $pagenow == 'post-new.php' ) {

        // check if it's right CPT
        if( isset($_GET['post_type']) && $_GET['post_type'] == 'sln_booking') {

            // search the plugin to disable among active plugins
            // Warning! Check the plugin directory and name
            $key = array_search( 'fat-gallery/fat-gallery.php' , $plugins );

            // if found, unset it from the active plugins array
            if ( false !== $key ) {
                unset( $plugins[$key] );
            }
        }
    }

    return $plugins;
}

Also, you can try Plugin Organizer.

Try something like this. This does not deactivate the whole plugin but just remove the script that causes problems. Not tested, look the functions up if you don´t know how to use them and what parameters to use.

// add this hook if in admin area
if (is_admin()) add_action("wp_enqueue_scripts", "my_dequeue_script", 99);
function my_jquery_enqueue() {
   // don´t do it if it´s not the page you want to remove the script
   if (get_current_screen() != "yourpage") return;
   // deregister the script
   // find the exact name of the script in the plugin where it is registered
   wp_deregister_script('fatgalleryScript');

}