RobotStudio .NET exception: The element 'RobotStudioAddIn' in namespace 'urn:abb-robotics-robotstudio-addin' has incomplete content. List of possible elements expected: 'Assembly' in namespace 'urn:abb-robotics-robotstudio-addin'

Hi, someone knows to fix this problem when start any release of RobotStudio?

“RobotStudio .NET exception: The element ‘RobotStudioAddIn’ in namespace ‘urn:abb-robotics-robotstudio-addin’ has incomplete content. List of possible elements expected: ‘Assembly’ in namespace ‘urn:abb-robotics-robotstudio-addin’.”

I´ve tried to Repair the SW but unsuccessful.

Tks in advance