Hi, does the problem occur in production only, or also in dev?
We had some issues with Google Closure Compiler and IE11 in the past, optimizing "too much". You could try to disable minification to narrow the problem down: org.apache.tapestry5.SymbolConstants.MINIFICATION_ENABLED Or you can check the core.js file received in the browser, too see the actual JS that IE11 doesn't like. I couldn't recreate your error, even though we're running 5.6.0. But there weren't changes to coffee files in 5.6.1 as far as I know. Ben On Tue, Oct 27, 2020 at 8:14 AM Hakan Sahin <sa...@avetana.de> wrote: > Hi there, > > I have a issue, when I am starting my web app (Tapestry 5.6.1) with IE 11. > I receive the following error message in every page load. The effect is, > that jQuery is not loading correctly and I can not use jQuery in my web > app. Do you have an idea, how I can solve this? Is their any work around to > skip/solve this error? > > - > - translation: Not closed constant > > Thank you for your support and best regards from Germany, > H. Sahin >