ADF deployment error: " weblogic.management.DeploymentException: Error: Unresolved Webapp Library references for "ServletContext@ ..."

The Error text sample:
[10:12:48 AM] Deploying Application...
[10:13:15 AM] Weblogic Server Exception: weblogic.application.ModuleException: Failed to load webapp: '/app1'
[10:13:15 AM] Caused by: weblogic.management.DeploymentException: Error: Unresolved Webapp Library references for "ServletContext@105216323[app:iApp module:/app1 path:/app1 spec-version:2.5]", defined in weblogic.xml [Extension-Name: jsf, Specification-Version: 2, exact-match: false]
[10:13:15 AM]   See server logs or server console for more details.
[10:13:15 AM] weblogic.application.ModuleException: Failed to load webapp: '/app1'
[10:13:15 AM] Deployment cancelled.
[10:13:15 AM] ----  Deployment incomplete  ----.
[10:13:15 AM] Remote deployment failed (oracle.jdevimpl.deploy.common.Jsr88RemoteDeployer)

This error commonly happens when application server can't find the library.

You need to go to View (WebTier) project's Project Properties in JDeveloper.
- Go to Deployment;
- Edit the deployment Profile;
- Go to Contributors under WEB-INF/lib;
- Click on the JSF 2.0;
- Press OK > OK;
- Save the application.
- ReDeploy the application into the Server.