After checkout page is still loading

[psm]

Dear all,
I have problem, when I press Checkout in on my Checkout page, page is still loading and order_done page is not showed. Order is finished in virtuemart and I can see it in databaze. I cannot find there any problem also on debug mode. Can you please advice me where can it be problem?

Joomla! 3.9.13 Stable
PHP 7.0.33
VirtueMart 3.6.10

Thank you

[GJC Web Design]

without live url it can only be guesses .. probably JS error