Umbraco Forms requires a validation framework to run

hi,
I’m using umbraco forms and I get the following message.

umbracoforms.js already loaded and I get the error.

any fix for this issue?

umbraco 8.6.4

Edit 1:

I also added follwoing scripts but the issue still exists.

<script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.0.0.min.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.16.1/jquery.validate.min.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/mvc/5.2.3/jquery.validate.unobtrusive.min.js"></script>

This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/109082-umbraco-forms-requires-a-validation-framework-to-run