Hello! Thanks for reaching out. I inspected your logs but the error seems to be unrelated to DevStyle. The other com.genuitec.
entries you mentioned are not related to this issue. I actually use 2019-09 with DevStyle for my regular development and “Customize perspective” opens the corresponding dialog just fine.
The interesting part about the stacktrace is:
Caused by: java.lang.NullPointerException
at org.eclipse.ui.internal.dialogs.cpd.CustomizePerspectiveDialog.getToolbarLabel(CustomizePerspectiveDialog.java:1380)
This makes me believe there’s a toolbar contribution that is badly implemented. Maybe a third party plugin you have installed besides DevStyle?
Cheers!
Aaron Lara