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Method public java.lang.String de.kittelberger.ocs.immutable.model.ThymeleafHelper.getHeaderAsString(java.lang.String,java.lang.String) throws de.kittelberger.ocs.api.exception.OCSBuilderException threw an exception when invoked on de.kittelberger.ocs.immutable.model.ThymeleafHelper@21588de9 The problematic instruction: ---------- ==> ${thymeleaf.getHeaderAsString(breadcrumb, backlink, pageType)} [on line 11, column 3 in category.ftl] ---------- Java backtrace for programmers: ---------- freemarker.template.TemplateModelException: Method public java.lang.String de.kittelberger.ocs.immutable.model.ThymeleafHelper.getHeaderAsString(java.lang.String,java.lang.String) throws de.kittelberger.ocs.api.exception.OCSBuilderException threw an exception when invoked on de.kittelberger.ocs.immutable.model.ThymeleafHelper@21588de9 at freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:130) at freemarker.core.MethodCall._getAsTemplateModel(MethodCall.java:93) at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) at freemarker.core.Expression.getStringValue(Expression.java:93) at freemarker.core.DollarVariable.accept(DollarVariable.java:76) at freemarker.core.Environment.visit(Environment.java:221) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:221) at freemarker.core.Environment.process(Environment.java:199) at de.kittelberger.ocs.util.FreemarkerBuildProcessor.buildWith(FreemarkerBuildProcessor.java:79) at de.kittelberger.ocs.util.factory.AbstractOCSBuilderFactory$AbstractOCSBuilder.buildItem(AbstractOCSBuilderFactory.java:61) at de.kittelberger.ocs.util.factory.CustomizedOCSBuilderFactory$CustomizedOCSBuilder.buildItem(CustomizedOCSBuilderFactory.java:57) at de.kittelberger.ocs.util.factory.CategoryPageBuilderFactory$CategoryPageBuilder.buildItem(CategoryPageBuilderFactory.java:128) at de.kittelberger.ocs.util.callable.CallableOCSBuilder.call(CallableOCSBuilder.java:28) at de.kittelberger.ocs.util.callable.CallableOCSBuilder.call(CallableOCSBuilder.java:10) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) at java.lang.Thread.run(Thread.java:662) Caused by: freemarker.template.TemplateModelException: Method public java.lang.String de.kittelberger.ocs.immutable.model.ThymeleafHelper.getHeaderAsString(java.lang.String,java.lang.String) throws de.kittelberger.ocs.api.exception.OCSBuilderException takes exactly 2 arguments at freemarker.ext.beans.SimpleMemberModel.unwrapArguments(SimpleMemberModel.java:94) at freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:106) ... 19 more