Problem: Running Systemdiagnostic the second time you get an validation error

Problem:

First running the system diagnostic tool via UMC dos not show any error the first time. Starting it the second time, you get this error message:
image

Validierungsfehler
1 Fehler aufgetreten:

  • plugin: Wert ist keine Zeichenkette

Solution:

You have to empty your browser cache. After that the system diagnostic is back on again.