virtuemart not sending me to payment site after clicking "confirm the order"

[danielll]

Hello, please I have a problem , virtuemart not sending me to payment site after clicking "confirm the order" but instead just do something like a page reset. Can u please help me with it?
It was going well before. I did not change anything, just added some items.
-this is my site: https://reachtraining.eu/webshop-sk

Thank you for the answer.

[jenkinhill]

Turn on VM debug to see the problem. VM Configuration/Shop/Advanced Settings

[danielll]

Thank you for the answer!, this is the only thing it says:
https://gyazo.com/e4a8e597b4df46a768b4319cd412b5b6

[danielll]

https://gyazo.com/c3121439b5ac3380e941fc111f898e20

[GJC Web Design]

Your using a 3rd party checkout

vmuikit_onepage

try with that disabled

if it works then contact those people