Sorting Table Tutorial

Hi,
I have followed the tutorial for creating a dynamic sorting table but like others here, have been unable to get the end result to work.

In Wappler preview mode I can see the sorting arrows but in any other web browser they are missing.

I preview mode and in any web browser, not sorting takes place.

I have tired using Bootstrap 4 and 5 each with the same result of the sort/direction not working.

Is there an updated tutorial on its way or has anyone managed to get the dynamic sort table working?

Many thanks
CK