Hi Vahid, This message is logged when a javascript error occurs while wicket processes Ajax response items:
https://github.com/apache/wicket/blob/master/wicket-core/src/main/java/org/apache/wicket/ajax/res/js/wicket-ajax-jquery.js?source#L113 My guess is that you (or some code you use) is adding some javascript code to a wicket Ajax response, which fails. You could inspect the Ajax response using e.g. chrome developer tools to see where a “Main” variable is referenced. Met vriendelijke groet, Kind regards, Bas Gooren Op 23 mei 2022 bij 13:03:16, vahid ghasemi (vahidghasemi...@gmail.com) schreef: Hello, I have the below error and I don't know this is from where and how I should fix it. FunctionsExecuter.processNext: ReferenceError: Main is not defined
