What / where is StattStrgToArray.vi? (unknown VI throwing generic error -1)

When I start my project in LabVIEW2017, I get this error message:

The problem is: This is not a file of my project. It is nowhere on disk, neither in my project directory, nor in any Laview directory.

I also used this code to find VIs inside of libraries. This code finds for example Beep.vi in system.llb, but no file containing 'Strg' :

I guess, this VI is a private VI in a library, so it isn't even displayed anywhere.  My project is quite large, finding out where this error occurs is quite hard. I'll try to find out, but maybe someone has an idea.