JTwig still having concurrency problem

gistfile1.txt

Caused by: com.lyncode.jtwig.exception.RenderException: com.lyncode.jtwig.exception.CalculateException: com.lyncode.jtwig.resource.WebJtwigResource@31e1a5eb -> Line 7, column 37: Unable to find function with name 'trans'
        at com.lyncode.jtwig.content.model.compilable.Output$Compiled.render(Output.java:56)
        at com.lyncode.jtwig..model.compilable.Sequence$Compiled.render(Sequence.java:80)
        at com.lyncode.jtwig.parser.JtwigParser$CompiledDocument.render(JtwigParser.java:67)
        at com.lyncode.jtwig.parser.JtwigParser$CompiledDocument.render(JtwigParser.java:67)
        at com.lyncode.jtwig.mvc.JtwigView.renderMergedTemplateModel(JtwigView.java:103)
        at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:167)
        at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)
        at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1228)
        at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1011)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:955)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
        ... 16 more
Caused by: com.lyncode.jtwig.exception.CalculateException: com.lyncode.jtwig.resource.WebJtwigResource@31e1a5eb -> Line 7, column 37: Unable to find function with name 'trans'
        at com.lyncode.jtwig.expressions.model.FunctionElement$Compiled.calculate(FunctionElement.java:82)
        at com.lyncode.jtwig.content.model.compilable.Output$Compiled.render(Output.java:52)
        ... 27 more
Caused by: com.lyncode.jtwig.functions.exceptions.FunctionNotFoundException: Unable to find function with name 'trans'
        at com.lyncode.jtwig.render.RenderContext.executeFunction(RenderContext.java:131)
        at com.lyncode.jtwig.expressions.model.FunctionElement$Compiled.calculate(FunctionElement.java:80)
        ... 28 more