vasconx

NO!

But the demo account is provided by you. Do I have to solve your server problem? Is that right?
I’m confused.

Hello!
Thanks for the support.
Yes, I am using the sandbox (free) site that I provided.
I have enabled the test mode, but I can't connect.
It connects and doesn't disconnect instantly.

I use Stripe to accept payments directly on my pages and have never had any issues.

On the Stripe connection page, I get some errors when I press f12 in the browser:

"Some resources are blocked because their origin is not listed in your site's Content Security Policy (CSP). Your site's CSP is whitelist-based, so resources must be whitelisted in order to be accessed.

A site's Content Security Policy is set via an HTTP header (recommended) or via an HTML meta tag.

To fix this issue, do one of the following:

(Recommended) If you are using a whitelist for 'script-src', consider switching from a whitelist CSP to a strict CSP, because strict CSPs are more robust against XSS. Here's how to set a strict CSP.

Or, carefully check that all blocked resources are trusted; if they are, include their sources in your site's CSP. ??Never add a source that you do not trust to your site's CSP your site. If you don't trust the source, consider hosting resources on your own site.

7 directives
Resource Status Directive Source Location
https://stripe.com/ blocked frame-ancestors (unknown)
https://stripe.com/ reports only frame-ancestors (unknown)
https://dashboard.stripe.com/ blocked frame-ancestors (unknown)
https://support-conversations.stripe.com/ blocked frame-ancestors (unknown)
https://marketplace.stripe.com/ blocked frame-ancestors (unknown)
https://support.stripe.com/ blocked frame-ancestors (unknown)
https://docs.stripe.com/ blocked frame-ancestors (unknown)
"