Error message upon open of iOS app

I get an error message (see screenshot) when I load the iOS app. I don’t get this error when I load it on my Mac. I think my only mobile-only plugin is Advanced Mobile Toolbar, so it’s probably something to do with that. Other than that, I’m clueless. Can someone please help me?

Sorry, We don’t take bug reports involving third party plugins.

Deactivate the plugin, restart the app, and see if the error is gone? If so, you’ve localised the problem, and can consider not using that plugin or contacting the developer of the plugin.