Cannot initialize Stripe frontend

[ghidosoft]

Hello, I'm integrating Stripe PSP with CommerceTools. I installed this connect via the marketplace and configured it, the webhook appears correctly updated in my Stripe dashboard. I added the connector to my CT app and in the checkout config.

However I cannot get the frontend to display the Stripe payment widget and I get these errors:

Looking in the code it appears that publishableKey is missing in the enabler. How can I configure this value? This variable is missing in the connect.yml file and I could not find it either in the documentation.

Thanks in advance.