Any idea what happened here with this BPROC model?

Tried out the BPROC for the first time and did a model and the application froze. I was able to save and download the xml. maybe this file can help debug it… if you load it the buttons and things will get stuck… i did not edit the xml in any way i made a model saved it and exported it.null.bpmn20.xml (2.1 KB)

Could you describe the steps to get such model? E.g. open the modeler, add NNN element, set the NNN value to the NNN property on the properties panel, etc.?