Hello,
I just got a “conflict” between Piklist admin js file and the banner builder from Thrive Ultimatum plugin. The problem appeared on the admin page when trying to edit some of the Thrive visual elements (in my case a banner). Thrive has its own builder for that and it is not using anything from WordPress, so that is why the error appears. And here is what I got in the console:

ReferenceError: piklist is not definedadmin.js:252:11
post_submit_meta_box https://******.com/wp-content/plugins/piklist/parts/js/admin.js?ver=1.0.6:252
init https://****.com/wp-content/plugins/piklist/parts/js/admin.js?ver=1.0.6:23
<anonymous> https://****.com/wp-content/plugins/piklist/parts/js/admin.js?ver=1.0.6:13
Backbone 4
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fireWith
ready
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As this page is something that will never use the Piklist functionality I just disabled Piklist for it. I did this by creating a small MU plugin and placed it in wp-content/mu-plugins folder. Here is the code:

<?php
/*
Plugin Name: Plugin-loading-restrictions
Description: Restricts the loading (activation) of selected plugins based on url of the opened page
Version: 0.0.1
Author: Alexander Vasilev
Author URI: timelinedev.com
*/

$is_admin    = strpos($_SERVER['REQUEST_URI'], '/wp-admin/');
$is_thrieve  = strpos($_SERVER['REQUEST_URI'], 'tve=true');

if (false !== $is_admin && $is_thrieve !== false ) {

	add_filter('option_active_plugins', function ($plugins) {
			$index = array_search('piklist/piklist.php', $plugins);
			unset($plugins[$index]);
			return $plugins;
	});

}

This basically solved the problem.
Hope this will help in case of someone get similar issue.

Regards,
Alex