Thanks Matthias for the feedback.

I've released a new version of the component.

I've cleaned the code a little bit, and there is a new action verifying if the function exists, not doing the invalid call.

Hope it helps.

I still get the above errormessage: 

Invalid call of the 'RefreshMessage' client action of the 'MainFlow.SyncFirstTime' since the latter is not currently active. This is likely due to a platform's client action being used as an event handler or in a setTimeout function. Consider removing this call by using the 'On Destroy' event of the screen/block or moving your logic to a global client action.