SEVERE Uncaught error java lang UnsupportedOperationExceptio kotlinlang #tornadofx

SEVERE: Uncaught error java.lang.UnsupportedOperat...

pike

10/06/2017, 2:33 AM

SEVERE: Uncaught error java.lang.UnsupportedOperationException at java.util.Collections$UnmodifiableList.add(Collections.java:1314)