Unable to get client cert for remoteCluster

[2018-03-20 03:52:30,090] - [rest_client:811] ERROR - POST http://172.23.98.156:8091/pools/default/remoteClusters body: username=Administrator&name=remote_cluster_C1-C2&certificate=-----BEGIN+CERTIFICATE-----%0AMIIDAjCCAeqgAwIBAgIIFR2aNEw4KKcwDQYJKoZIhvcNAQELBQAwJDEiMCAGA1UE%0AAxMZQ291Y2hiYXNlIFNlcnZlciBmZTE1ZDYxNDAeFw0xMzAxMDEwMDAwMDBaFw00%0AOTEyMzEyMzU5NTlaMCQxIjAgBgNVBAMTGUNvdWNoYmFzZSBTZXJ2ZXIgZmUxNWQ2%0AMTQwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCWk5MdyQ1Jks%2BxEq%2Fd%0Aqw4YIl4%2F073nxFdKsYTcue2kR9UVSEPzLa1SKQn0UUQyqJOYurmHggWzoG6RfLll%0AEMmvgd4T20e%2BfaR0c61BftAEMz5Ly9L%2BZ%2B2tkYvz%2FoQEWPV6IW068Yk55gtR5%2FUj%0AUQUYLl8r7lF4xZsYvEcHko1UUkoBtkAWWufGe5VTr6Znh3BSvSMZPoio%2BleMgF9S%0AWaZK1wK4Z6AmL8dp78LOaWVn6%2FTwsXRjdc0jFHSAVm9%2Fu7cv3fBJ716eQJe5OalA%0A8ke9DnJfCLOiaY5bxvasNq12%2FfevxA%2BuP14UM8gwnoocewmp41FVlVg%2FIV0wz1fQ%0AB4afAgMBAAGjODA2MA4GA1UdDwEB%2FwQEAwICpDATBgNVHSUEDDAKBggrBgEFBQcD%0AATAPBgNVHRMBAf8EBTADAQH%2FMA0GCSqGSIb3DQEBCwUAA4IBAQB9VYVdlNFbRZ6j%0A4Jsghk1pBWgLd6anViuLCqnsCMdPv%2FKKMRdw%2F0xSNVnC9Arhs1B7fEFzhO8rXEjM%0APuIllwPkGiT7cTa%2BcO11agCE79iitQzaLSQCNxK%2BUT1r30PMN0hdq78ZfZOOVgCV%0AawhKTuko7b%2F%2FfEW9TCp8Q2e4lx4c4DNxAqzn6DYkLbp1j0HuQbmuH03xQU3PF9cG%0AgMRl0IY9FkEx%2FnOjXInxTJ7LBSLMlJzY8hzf5nMXFoaBN7StZuoecqx%2FlR3rVNZR%0ALWUHOXst5PKk4VyrAa8bZGlg0u%2BqhZW9RhxmJfUSc4Bf1RTG0%2BlMRC4nl9IBxGt6%0AyygBJT%2B5%0A-----END+CERTIFICATE-----%0A&demandEncryption=on&hostname=172.23.106.157%3A8091&password=password headers: {'Content-Type': 'application/x-www-form-urlencoded', 'Accept': '*/*', 'Authorization': 'Basic QWRtaW5pc3RyYXRvcjpwYXNzd29yZA==\n'} error: 400 reason: unknown {"_":"Can't get client cert auth information for cluster 172.23.106.157:8091. clusterInfo=map[remoteClusters:map[uri:/pools/default/remoteClusters?uuid=db313ea2c0117a6f44e79211d827aac6 validateURI:/pools/default/remoteClusters?just_validate=1]