UiPath 2018.3 Error in xaml

Whenever i try to open my workflow which is created on another laptop then recently i got error like “Activiy could not be open because of error in xaml file” however i do not use any custom activity in this
i encounter this error from last one week.
please help me.

The packages might be missing in the current machine. Please check the output panel for detailed error on what package is missing. Then you can add missing package in Manage packages. :grinning: