How to fix the error "Non-readable POM" after creating a project in RHDM/RHPAM 7 running behind a firewall ?

Issue

• How to fix the error below which happens after creating a project in RHDM HA at OCP4 ?

ERROR [org.appformer.maven.integration.embedder.MavenProjectLoader] (default task-234) Unable to create MavenProject from InputStream: org.apache.maven.project.ProjectBuildingException: 1 problem was encountered while building the effective model
[FATAL] Non-readable POM : input contained no data @ 
 for project 
    at deployment.ROOT.war//org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:168)
    at deployment.ROOT.war//org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:126)
    at deployment.ROOT.war//org.appformer.maven.integration.embedder.MavenEmbedder.readProject(MavenEmbedder.java:312)
    at deployment.ROOT.war//org.appformer.maven.integration.embedder.MavenProjectLoader.parseMavenPom(MavenProjectLoader.java:91)
    at deployment.ROOT.war//org.appformer.maven.integration.embedder.MavenProjectLoader.parseMavenPom(MavenProjectLoader.java:84)
    at deployment.ROOT.war//org.appformer.maven.integration.MavenPomModelGenerator.parse(MavenPomModelGenerator.java:34)
    at deployment.ROOT.war//org.appformer.maven.support.PomModel$Parser.parse(PomModel.java:110)
        ...
Caused by: org.apache.maven.model.building.ModelBuildingException: 1 problem was encountered while building the effective model
[FATAL] Non-readable POM : input contained no data @