" 500 Internal Server ERROR " by Updating template page

[mrleonz]

Hi,

I'm trying to make a webshop with Elementor pro-> custom product archives.
This because i don't want to use product images in my webshop and i didn't figured out how to make that webshop simply as possible. (i'm a beginner)

If i use the widget: Custom add to cart --> Show Quantity.

Then i get a " 500 Internal Server Error." and can't save my page.

Watch this video:

http://imgur.com/a/5fApDtA

Does someone know why this happen?

p.s. Does someone have tips for me to make a webshop like this. (only this categorie has pictures, other categories don't have pictures!)

Thanks in advance!