I given my code in codepen for your views and I am unable to fix why Colvis is not showing in the output.
[https://codepen.io/Sixthsense6/pen/poKZoVz][1]
Don't know why SO is pushing me to embed the link under code tag.
You are missing quotes in the second script, at the end of the url. You don't need to add scripts in settings as pointed out by @freedomn-m
Other option -
You can add your scripts in JS tab "Add External Scripts/Pens " and styles in css tab
Attached the screenshot
Check this link **https://codepen.io/nishant1207/pen/ExRpaBe?editors=1111**
. It works as expected.