Ansible - Bad HTTP Response

Get Help
,
1

I installed Ansible on a VM and want to automate Windows Updates on Windows Hosts. When i try to ping the hosts with the command: ansible test -m win_ping -vvv i receive a Bad HTTP Error

client.xxx.DE | UNREACHABLE! => {
    "changed": false,
    "msg": "kerberos: Bad HTTP response returned from server. Code 502, plaintext: Bad HTTP response returned from server. Code 502",
    "unreachable": true
}

The ansible host file:

[test]
client.xxx.DE

[test:vars]
ansible_user=User@xxx.DE
#ansible_passwort=Passwort
ansible_connection=winrm
ansible_transport=kerberos
ansible_port=5985

Krb5.conf File:


[libdefaults]
        default_realm = xxx.DE
        allow_weak_crypto = true
        kdc_timesync = 1
        ccache_type = 4
        forwardable = true
        proxiable = true
        fcc-mit-ticketflags = true

[realms]
XXX.DE = {
        kdc = dc1.xxx.de
        kdc = dc2.xxx.de
 }

[domain_realm]
.xxx.de = XXX.DE
xxx.de = XXX.DE

When i test the connection via nc -z -w1 client 5985;echo $? i get a return of 0

The win WINRM Config on the remote host:

Service
    RootSDDL = O:NSG:BAD:P(A;;GA;;;BA)(A;;GR;;;IU)S:P(AU;FA;GA;;;WD)(AU;SA;GXGW;;;WD)
    MaxConcurrentOperations = 4294967295
    MaxConcurrentOperationsPerUser = 1500
    EnumerationTimeoutms = 240000
    MaxConnections = 300
    MaxPacketRetrievalTimeSeconds = 120
    AllowUnencrypted = true
    Auth
        Basic = false
        Kerberos = true
        Negotiate = true
        Certificate = false
        CredSSP = false
        CbtHardeningLevel = Relaxed
    DefaultPorts
        HTTP = 5985
        HTTPS = 5986
    IPv4Filter = xxx-xxx [Source="GPO"]
    IPv6Filter [Source="GPO"]
    EnableCompatibilityHttpListener = false
    EnableCompatibilityHttpsListener = false
    CertificateThumbprint
    AllowRemoteAccess = true [Source="GPO"]

We use a proxy Server in our environment