RobotStudio event

Instruction Template Manager Error

I have made an action instruction template.

I can importet it, use it in my station and sync it to the controller. 

But after I have closed the station and try to open the instruction template manager again to import more templates, I get this error. 
Does anyone know anything about this?  (same issue in RS 5.15, 5.60 and 6.02)