Designer lock up / crashes silent

Hello.
I started using Ignition last week. I am trying to make some dynamic UDTs communicating with Siemens PLC over OPC UA. Doing stuff that probably are syntactical wrong - but I am following the "learning by failing" principle.

Changing a Parameter

(Sorry for weird formatting, I did not know of the 3 media limit. This was the fastest way to bypass it)

Did you check the logs?