Promises resolving to an error

[queesamor]

I am trying to handle errors generated when calling someRendererJS.remoteFunctionCall() with the standard promise error handler ( someRendererJS.remoteFunctionCall().then().then()......error() ), but any time I stick .error(function(e){}) into the promise flow I get told by Electron that "that function (the entire promise tree in that call) is not a valid function". Is the standard error handler not available, and if so, how can I handle promises that are rejected / result in errors?