Access the Shopify Admin panel

Go to Online Store, then select Themes.

Locate your active theme and click the three-dot menu next to the "Customize" button.

Select "Edit default theme content" from the dropdown menu.

In the "Theme Content" editor, click the tab "Checkout & system".

Look for the following entries:

• "No method error"

• "Not configured error"

  

Update the text with your custom message, such as: "Payment options will be displayed after filling in the shipping address."

Click "Save" to apply your changes.