Latest version. adding products to basket from product page not possible

[emel]

hi there
since some days, when i disable mootools i can choose the number of items i want to buy, from the product page BUT the animation icon/popup "added to basket" shows a infinite loop.
With mootools ENabled, i can't choose the number of items anymore. when you click the basket icon, you go directly to the total order page with all items lined up.

i also downgraded back to php 7.0 this is not the issue.

Shop is www.wijnwarenhuis.be

We also can't go to the last step of the payment process...
(we switched to a basic template, which shows the same flaws)

thx

[jenkinhill]

Mootools?? VM does not use moo, but I guess your template is old? You say latest versions - so Joomla 3.9.2 with VM 3.4.2 or are you using one of the VM 3.4.3 versions?

Are you using an OPC plugin? If so it may need updating as well.

[Studio 42]

You should enable PHP error reporting in your Joomla config, so you can see the error. The problem is not javascript but a PHP problem