Forwarding & installing .xaml file on other PC

Dear all,

I have created a Bot (.xaml file) with UiPath Studio Pro and have forwarded the file as well as the complete folder to a colleague for installation on his PC. The colleague has the exact same UiPath version. We saved the complete folder on his PC but once he tries to open the .xaml file the attached error message occurs. Can someone please support in fixing this error. Thank you in advance!

UiPath Version

In English the error message says: The type with the name…can not be found by the type reference

It is also not possible to open a new main.xaml after creating a new process?!
Can anybody please give some support!

Issue still has not been solved. Has nobody here experienced a similar problem? I kindly ask for your support!