[Publishing] Can't publish artifacts to directory

[aalmiray]

An exception occurs when a directory based repository is configured

config {
    info {
        repositories {
            repository {
                name = 'releaseRepo'
                url  = "${project.rootProject.buildDir}/repos/releases"
            }
        }
    }

    publishing {
        signing            = true
        releasesRepository = 'releaseRepo'
    }
}

The error is

Execution failed for task ':sample:publishMainPublicationPublicationToMavenRepository'.
> Failed to publish publication 'mainPublication' to repository 'maven'
   > Authentication scheme 'all'(Authentication) is not supported by protocol 'file'

The problem is caused by empty credentials