Failed to load language 'IronPython 2.7.4'

I made grasshopper file using ghpython and gave it to collegue.
However, if we try to open the file, her PC issue the below error from ghpython component.

  1. Solution exception:Failed to load language ‘IronPython 2.7.4’: Method not found: ‘System.Collections.Generic.IEnumerable`1<!!0> Microsoft.Scripting.Utils.ReflectionUtils.GetCustomAttributes(System.Reflection.Assembly, Boolean)’.

Can anyone tell me how I can fix this problem?
Thank you.

Is any of you having a different version of IronPython installed?