Magnolia 5.6 reached end of life on June 25, 2020. This branch is no longer supported, see End-of-life policy.
...
The bundles and webapps in the 5.6 branch are shipped with publishing by default. If you are migrating from a pre-5.6 Magnolia branch and intend to use publishing, please see the Publishing vs Activation and custom commands section on the Upgrading to Magnolia 5.6.x page.
...