Multiple repositories in Gradle 4.3

Yes, we got a “400” code

 > Could not resolve :Wowza Media Server 3.6.2/lib/jid3lib-0.5.4:.
   Required by:
       project :WowzaModules_3_x
    > Could not resolve :Wowza Media Server 3.6.2/lib/jid3lib-0.5.4:.
       > Could not get resource 'http://artifact-repo:38081/repository/external-proxy//Wowza%20Media%20Server%203.6.2/lib/jid3lib-0.5.4//Wowza%20Media%20Server%203.6.2/lib/jid3lib-0.5.4-.pom'.
        > Could not GET 'http://artifact-repo:38081/repository/externals//Wowza%20Media%20Server%203.6.2/lib/jid3lib-0.5.4//Wowza%20Media%20Server%203.6.2/lib/jid3lib-0.5.4-.pom'. 
        Received status code 400 from server: Invalid repository path