Error of render a widget

Hi guys After researching in the forum, I have not get the answer, so post here to try get some help. When I added a widget with an extra javascript file, I got a error message: Unable to render mxuiwidgetMxFormView_0 widget: Could not load class Do you have to debug and fix the issue? BTW: the code is below: if (typeof(jQuery) == "undefined") { dojo.require(""); } Best regards
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