freemarker.core.NonHashException: [... Exception message was already printed; see it above ...]

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freemarker.core.NonHashException: [... Exception message was already printed; 
see it above ...]	at freemarker.core.Dot._eval(Dot.java:45)	at freemarker.core.Expression.eval(Expression.java:78)	at freemarker.core.ListLiteral.getModelList(ListLiteral.java:95)	at freemarker.core.MethodCall._eval(MethodCall.java:60)	at freemarker.core.Expression.eval(Expression.java:78)	at freemarker.core.Assignment.accept(Assignment.java:70)	at freemarker.core.Environment.visit(Environment.java:312)	at freemarker.core.MixedContent.accept(MixedContent.java:62)