[cflsystems]

Thank you Max but at this point these themes also need to be updated to work with what's on their sell page - for this theme "Compatible: 5.3.x "

It is not compatible with 5.3.3.4, not sure for 5.3.3.3

The point is these themes are not being checked with every version release if they are still working with the new changes or not.

You check every module which is included with the release or developed by you but not the themes. That's not good.

Not sure how this is malfunction of the LESS engine since the cart is loading exactly the file it is told to load and this file is missing variables.

It is if any php file tries to load another php file which doesn't exists, quits with fatal error and we blame it on the PHP engine...