simplify payment plugin problem

[artonweb]

Hello.
I have design a website with Joomla 3.9.15 and Virtuemart 3.6.10
I have install the plugin "simplify-joomla-virtuemart-module"
When I choose the simplify payment method on checking out the website freezes and nothing occur.
Any suggestion will be helpful.

[Jörgen]

Any questions should be addressed to :

https://www.simplify.com/commerce/

Jörgen @ Kreativ Fotografi

[artonweb]

I suppose that is a Jquery problem.
When I turn on the plugin JCH optimize with option "Pemium" (in automating settings) the pop up window appears BUT occurs other problems.