1
It has already happened in other pages (of the same project) and I was able to solve by downloading a file and importing
<script src="../JavaScript/jquery-2.1.3.min.js" type="text/javascript"></script>
In other pages works perfectly, but this keeps giving this error.
you remembered to import jquery before other scripts tags ?
– Gabriel José de Oliveira
Probably the error is happening because you are using relative paths. So try importing jQuery absolutely. For example:
http://localhost/JavaScript/jquery-2.1.3.min.js
.– Luiz Felipe