How to resolve message ' Requires: Commerce_checkout (missing)'? I have installed the Commerce Checkout Pages module (as the tar.gz file), as shown in this image:



Note the message shown within its description, i.e:

Requires: Commerce_checkout (missing)


Now I want to enable it, but I don't know how I resolve the missing part of the module.

Any help?
You need to install the Commerce module.

Commerce Checkout is a submodule thereof.