Hello Randal,
You can use another jQuery version by adding the reference to it instead of the one included when you create a new Telerik project.
<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
<script src="https://kendo.cdn.telerik.com/2020.1.114/js/kendo.all.min.js"></script>
As for the error you are receiving, I tested the links from your last reply and I was able to reproduce the problem. I managed to resolve it by referencing a more recent boostrap version. Here is a small Dojo example for reference.
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">
<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
<script src="https://kendo.cdn.telerik.com/2020.1.114/js/jszip.min.js"></script>
<script src="https://kendo.cdn.telerik.com/2020.1.114/js/kendo.all.min.js"></script></head>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
I hope the above was helpful. Feel free to contact us whenever you have Kendo related questions.
Regards,
Martin
Progress Telerik