$(...).jqBootstrapValidation is not a function at HTMLDocument.<anonymous> - asp.net

Question

i am trying to implement a contact us page using bootstrap template. I am a really beginner in asp.net and its my first time using a template.
I cant really get it where is the problem that is causing the above error.
I want to when the user click the send Message button to send emails to a current business email.
Can anyone help me?
contact.cshtml
<div class="row">
<div class="col-lg-8 mb-4">
<h3>Send us a Message</h3>
<form name="sentMessage" id="contactForm" novalidate>
<div class="control-group form-group">
<div class="controls">
<label>Full Name:</label>
<input type="text" class="form-control" id="name" required data-validation-required-message="Please enter your name.">
<p class="help-block"></p>
</div>
</div>
<div class="control-group form-group">
<div class="controls">
<label>Phone Number:</label>
<input type="tel" class="form-control" id="phone" required data-validation-required-message="Please enter your phone number.">
</div>
</div>
<div class="control-group form-group">
<div class="controls">
<label>Email Address:</label>
<input type="email" class="form-control" id="email" required data-validation-required-message="Please enter your email address.">
</div>
</div>
<div class="control-group form-group">
<div class="controls">
<label>Message:</label>
<textarea rows="10" cols="100" class="form-control" id="message" required data-validation-required-message="Please enter your message" maxlength="999" style="resize:none"></textarea>
</div>
</div>
<div id="success"></div>
<!-- For success/fail messages -->
<button type="submit" class="btn btn-primary" id="sendMessageButton">Send Message</button>
</form>
</div>
</div>
</div>
<script src="~/Content/vendor/jquery/jquery.min.js"></script>
<script src="~/Scripts/contact_me.js"></script>
<script src="~/Scripts/jqBootstrapValidation.js"></script>
<script src="~/Content/vendor/bootstrap/js/bootstrap.min.js"></script>
contact_me.js
$(function () {
$('#contactForm input,#contactForm textarea').jqBootstrapValidation({
preventSubmit: true,
submitError: function($form, event, errors) {
// additional error messages or events
},
submitSuccess: function($form, event) {
event.preventDefault(); // prevent default submit behaviour
// get values from FORM
var name = $("input#name").val();
var email = $("input#email").val();
var phone = $("input#phone").val();
var message = $("textarea#message").val();
var firstName = name; // For Success/Failure Message
// Check for white space in name for Success/Fail message
if (firstName.indexOf(' ') >= 0) {
firstName = name.split(' ').slice(0, -1).join(' ');
}
$this = $("#sendMessageButton");
$this.prop("disabled", true); // Disable submit button until AJAX call is complete to prevent duplicate messages
$.ajax({
url: "mail/contact_me.php",
type: "POST",
data: {
name: name,
phone: phone,
email: email,
message: message
},
cache: false,
success: function() {
// Success message
$('#success').html("<div class='alert alert-success'>");
$('#success > .alert-success').html("<button type='button' class='close' data-dismiss='alert' aria-hidden='true'>×")
.append("</button>");
$('#success > .alert-success')
.append("<strong>Your message has been sent. </strong>");
$('#success > .alert-success')
.append('</div>');
//clear all fields
$('#contactForm').trigger("reset");
},
error: function() {
// Fail message
$('#success').html("<div class='alert alert-danger'>");
$('#success > .alert-danger').html("<button type='button' class='close' data-dismiss='alert' aria-hidden='true'>×")
.append("</button>");
$('#success > .alert-danger').append($("<strong>").text("Sorry " + firstName + ", it seems that my mail server is not responding. Please try again later!"));
$('#success > .alert-danger').append('</div>');
//clear all fields
$('#contactForm').trigger("reset");
},
complete: function() {
setTimeout(function() {
$this.prop("disabled", false); // Re-enable submit button when AJAX call is complete
}, 1000);
}
});
},
filter: function() {
return $(this).is(":visible");
},
});
$("a[data-toggle=\"tab\"]").click(function(e) {
e.preventDefault();
$(this).tab("show");
});
});
/*When clicking on Full hide fail/success boxes */
$('#name').focus(function() {
$('#success').html('');
});

Answer 1

As my answer morphed through the comments:
the answer was that the OP added Jquery twice making a conflict in
file jqBootstrapValidation.js
Also, to help others based on the OP's post, this next part could be helpful as well:
Javascript files need to be loaded in the order of their dependence. Since your custom javascript file, contact_me.js depends on functions contained in the javascript file, jqBootstrapValidation.js, you need to load jqBootstrapValidation.js before contact_me.js, to fix this switch the order in which these files are loaded:
<script src="~/Content/vendor/bootstrap/js/bootstrap.min.js"></script>
<script src="~/Scripts/jqBootstrapValidation.js"></script>
<script src="~/Content/vendor/jquery/jquery.min.js"></script>
<script src="~/Scripts/contact_me.js"></script>