I have tested the Toast plugin and it works as expected. You can find the demo app attached for reference.
Can you confirm, that you are not testing the plugin in the simulator or in the AppBuilder companion app? As you might know and as stated in this documentation article
, most custom Cordova plugins are not supported in the AppBuilder simulator or the companion app. The plugins in the Telerik Verified Plugins Marketplace are custom plugins, that are verified and supported by Telerik. They will not work inside the Simulator or Companion app. Please, let me know if this is the case. If this is not the case, please send a sample app that can reproduce the issue.
Also, let me know if the Toast demo app is working on your side. I am looking forward to your reply.