Your account needs to be connected with a payment processor like Stripe for customers to be able to buy your offers.
To connect your account with Stripe, you can follow the steps below:
It will open a page where you can see two text fields.
For quick access to your Stripe account, you can click the [Click here] button
After logging in, you will be on a page where you can find the required Publishable Key and Secret Key. You might need to click the [Reveal test key] button to show the Secret key.