Uncaught TypeError: Cannot set property ‘unobtrusive’ of undefined
Another reason this error can occur is if you load the unobtrusive script before jquery.validate. So, <script src=”https://stackoverflow.com/scripts/jquery.validate.min.js” type=”text/javascript”></script> <script src=”https://stackoverflow.com/scripts/jquery.validate.unobtrusive.min.js” type=”text/javascript”></script> is OK, but: <script src=”https://stackoverflow.com/scripts/jquery.validate.unobtrusive.min.js” type=”text/javascript”></script> <script src=”https://stackoverflow.com/scripts/jquery.validate.min.js” type=”text/javascript”></script> will give the “Cannot set property ‘unobtrusive’ of undefined” error.