Hi,
As workaround, can you try to modify your xaml file with notepad as the following step? Similar problem (secure string and System.Runtime.InteropServices) have been solved by this.
- Close Studio
- Copy your xaml file(Main.xaml?) to other place for backup
- Open your xaml using Notepad (or any text editor)
- Add the following element inside
<sco:Collection x:TypeArguments="AssemblyReference">
(There are many AssemblyReference elements)
<AssemblyReference>System.Runtime.InteropServices</AssemblyReference>
- Save it
- Launch Studio, then open the project.
Regards,