Payment Services: the "Sandbox onboarding" button is disabled

[smartsites]

Commerce Service Connector is configured: sandbox and production keys are filled; the project and data space are created.

But the "Sandbox onboarding" button is disabled on the "Sales -> Payment Services" page.

I don't understand why the button "Sandbox onboarding" is disabled. And what else should I configure to make it enable?

Magento Open Source ver. 2.4.6-p3

[hloveall]

Hi there, that means that there is a mismatch within the keys. I will message you separately to set up a time to fix. 

Harrison 

Payment Services Sales Manager

hloveall@adobe.com