Custom No longer sees orders

-- HikaShop version -- : 3.2.2
-- Joomla version -- : 3.8.3
-- PHP version -- : 5.6.3
-- Error-message(debug-mod must be tuned on) -- : Notice: Undefined variable: s5_fonts_highlight in /*Protected/templates/design_control/index.php on line 32

Customers on a client's site can no longer see the orders. I've confirmed this on my admin account with test orders.

Hello,

That's weird, can you test it with one of default Joomla front-end template so that we can see if it works fine with it ? Thank you.

Also, note that the notice message is actually coming from your template.

Yes, I'm aware that error has to do with the template. I just thought I'd include it because it was the only error. Yes, switching to Prostar I see everything, including the prices. What about the template causes the prices to be $0.00? Also, the client still is using php 5.6.30. Is this a contributing factor?

Keep in mind, this is the same template they've had for nearly 5 years.

Hello,

Your template has an override for that view and that override is no longer working.
So best would be to delete that override.

Please note that HIkaShop evolved in the past 5 years ; and there was a major release with HikaShop 3 which affect a lot of view and code.
Major release need to "break" some old legacy support regarding view if it want to go forward.

Regards,