If you made some actions and found the "toast.effect" error in the developers console it usually means that your Plugin integration is working in <iframe>, where you have to additionally connect the jQuery UI library.
For right connection you should do this within the same place where you connect our notifications.js script. Before this script please include additionally jQuery-UI script and please check the compatibility of it with your application.
If something still not working there we suggest you connecting the editor in the iframe. This will isolate the influence of the editor to your app as well as the connected JQuery-UI library.
When it's done (and compiled) please check it on your end and let us know if it doesn't help you