Need urgent help, can not add to cart

[Studio1one]

Suddenly after I activated our popup ads it's not possible to add products in cart. ( It's now deactivated)

Either on category level or on the actually product pages it works to add to cart.

Probably it could be an ajax issue or similar.

Anyone who got time to give an helping hand to fix it?

Using on this shop PS 1.7.6.8 ( LEO theme )

//P

[Knowband Plugins]

Please enable the debug mode from the directory

config/defines.inc

Change:

define('_PS_MODE_DEV_', false);

To:

define('_PS_MODE_DEV_', true);

After that if there is any error message showing on the page/for the Ajax request sent, please let us know also you can check the error log directory and
share the same for the error details.