trident: Unable to install v18.04 on OpenShift 3.9

we followed the installations steps described at https://netapp-trident.readthedocs.io/en/stable-v18.04/kubernetes/deploying.html#download-extract-the-installer

we starting the installation on the master.

[root@se1-ocpma-e100 trident-installer]# cat setup/backend.json 
{ 
    "version": 1, 
    "storageDriverName": "ontap-nas", 
    "managementLIF": "4.168.16.25", 
    "username": "aaa", 
    "password": "xxx", 
    "defaults": { 
      "spaceReserve": "none", 
      "exportPolicy": "openshift" 
    } 
} 


[root@se1-ocpma-e100 trident-installer]# ./tridentctl install -n netapp2 -d 
DEBU Initialized logging.                          logLevel=debug 

DEBU Initialized Kubernetes CLI client.            cli=oc flavor=openshift namespace=netapp2 version=1.9. 
DEBU Validated Trident installation environment.   installationNamespace=netapp2 kubernetesVersion=1.9.1+ 
DEBU Parsed requested volume size.                 quantity=2Gi 
DEBU Namespace exists.                             namespace=netapp2 
DEBU PVC does not exist.                           pvc=trident 
DEBU PV does not exist.                            pv=trident 
INFO Starting storage driver.                      backend=/root/trident-installer/setup/backend.json 
DEBU config: {"defaults":{"exportPolicy":"openshift","spaceReserve":"none"},"managementLIF":"4.168.16.25" 
DEBU Storage prefix is absent, will use default prefix. 
DEBU Parsed commonConfig: {Version:1 StorageDriverName:ontap-nas BackendName: Debug:false DebugTraceFlags 
DEBU Initializing storage driver.                  driver=ontap-nas 
DEBU Addresses found from ManagementLIF lookup.    addresses="[4.168.16.25]" hostname=4.168.16.25 
DEBU Using derived SVM.                            SVM=se1-svm-s01 
DEBU ONTAP API version.                            Ontapi=1.110 
WARN Could not determine controller serial numbers. API status: failed, Reason: Unable to find API: syste 
DEBU Configuration defaults                        Encryption=false ExportPolicy=openshift FileSystemTypene SplitOnClone=false StoragePrefix=trident_ UnixPermissions=---rwxrwxrwx 
DEBU Data LIFs                                     dataLIFs="[4.168.16.25]" 
DEBU Found NAS LIFs.                               dataLIFs="[4.168.16.25]" 
DEBU Configured EMS heartbeat.                     intervalHours=24 
DEBU Read storage pools assigned to SVM.           pools="[sdeb_nas_t001_data01 sdeb_nas_t002_data01]" sv 
DEBU Read aggregate attributes.                    aggregate=sdeb_nas_t001_data01 mediaType=hdd 
DEBU Read aggregate attributes.                    aggregate=sdeb_nas_t002_data01 mediaType=hdd 
DEBU Storage driver initialized.                   driver=ontap-nas 
INFO Storage driver loaded.                        driver=ontap-nas 
INFO Starting Trident installation.                namespace=netapp2 
DEBU Deleted Kubernetes object by YAML. 
DEBU Deleted cluster role binding. 
DEBU Deleted Kubernetes object by YAML. 
DEBU Deleted cluster role. 
DEBU Deleted Kubernetes object by YAML. 
DEBU Deleted service account. 
DEBU Removed Trident user from security context constraint. 
DEBU Created Kubernetes object by YAML. 
INFO Created service account. 
DEBU Created Kubernetes object by YAML. 
INFO Created cluster role. 
DEBU Created Kubernetes object by YAML. 
INFO Created cluster role binding. 
INFO Added Trident user to security context constraint. 
DEBU Created Kubernetes object by YAML. 
INFO Created PVC. 
DEBU Attempting volume create.                     size=2147483648 storagePool=sdeb_nas_t001_data01 volCo 
DEBU Created Kubernetes object by YAML. 
INFO Created PV.                                   pv=trident 
INFO Waiting for PVC to be bound.                  pvc=trident 
DEBU PVC not yet bound, waiting.                   increment=619.512855ms pvc=trident 
DEBU PVC not yet bound, waiting.                   increment=676.793322ms pvc=trident 
DEBU PVC not yet bound, waiting.                   increment=1.225961586s pvc=trident 
DEBU Logged EMS message.                           driver=ontap-nas 
DEBU PVC not yet bound, waiting.                   increment=1.328790335s pvc=trident 
DEBU Created Kubernetes object by YAML. 
INFO Created Trident deployment. 
INFO Waiting for Trident pod to start. 
DEBU Trident pod not yet running, waiting.         increment=619.624506ms 
DEBU Trident pod not yet running, waiting.         increment=870.617544ms 
DEBU Trident pod not yet running, waiting.         increment=844.84827ms 
INFO Trident pod started.                          namespace=netapp2 pod=trident-cdd5fc7b4-ls8h4 
INFO Waiting for Trident REST interface. 
DEBU Invoking tunneled command: oc exec trident-cdd5fc7b4-ls8h4 -n netapp2 -c trident-main -- tridentctl 
DEBU REST interface not yet up, waiting.           increment=360.640418ms 
DEBU Invoking tunneled command: oc exec trident-cdd5fc7b4-ls8h4 -n netapp2 -c trident-main -- tridentctl 
DEBU REST interface not yet up, waiting.           increment=877.614503ms 
DEBU Invoking tunneled command: oc exec trident-cdd5fc7b4-ls8h4 -n netapp2 -c trident-main -- tridentctl 
DEBU REST interface not yet up, waiting.           increment=1.520820412s 
DEBU Invoking tunneled command: oc exec trident-cdd5fc7b4-ls8h4 -n netapp2 -c trident-main -- tridentctl 
DEBU REST interface not yet up, waiting.           increment=1.834092202s 
DEBU Invoking tunneled command: oc exec trident-cdd5fc7b4-ls8h4 -n netapp2 -c trident-main -- tridentctl 
DEBU REST interface not yet up, waiting.           increment=3.152914941s 
DEBU Invoking tunneled command: oc exec trident-cdd5fc7b4-ls8h4 -n netapp2 -c trident-main -- tridentctl 
DEBU REST interface not yet up, waiting.           increment=3.145476382s 
DEBU Invoking tunneled command: oc exec trident-cdd5fc7b4-ls8h4 -n netapp2 -c trident-main -- tridentctl 
DEBU REST interface not yet up, waiting.           increment=6.207780768s 
DEBU Invoking tunneled command: oc exec trident-cdd5fc7b4-ls8h4 -n netapp2 -c trident-main -- tridentctl 
DEBU REST interface not yet up, waiting.           increment=5.170037335s 
DEBU Invoking tunneled command: oc exec trident-cdd5fc7b4-ls8h4 -n netapp2 -c trident-main -- tridentctl 
DEBU REST interface not yet up, waiting.           increment=18.007844228s 
DEBU Invoking tunneled command: oc exec trident-cdd5fc7b4-ls8h4 -n netapp2 -c trident-main -- tridentctl 
DEBU REST interface not yet up, waiting.           increment=16.276606311s 
DEBU Invoking tunneled command: oc exec trident-cdd5fc7b4-ls8h4 -n netapp2 -c trident-main -- tridentctl 
DEBU REST interface not yet up, waiting.           increment=34.967432358s 
DEBU Invoking tunneled command: oc exec trident-cdd5fc7b4-ls8h4 -n netapp2 -c trident-main -- tridentctl 
DEBU REST interface not yet up, waiting.           increment=42.703850717s 
DEBU Invoking tunneled command: oc exec trident-cdd5fc7b4-ls8h4 -n netapp2 -c trident-main -- tridentctl 
ERRO Trident REST interface was not available after 120.00 seconds. 
WARN An error occurred during installation, cleaning up. 
DEBU Deleted Kubernetes object by YAML. 
INFO Deleted cluster role binding. 
DEBU Deleted Kubernetes object by YAML. 
INFO Deleted cluster role. 
DEBU Deleted Kubernetes object by YAML. 
INFO Deleted service account. 
INFO Removed Trident user from security context constraint. 
DEBU Deleted Kubernetes object by name.            pvc=trident 
INFO Deleted PVC.                                  pvc=trident 
DEBU Deleted Kubernetes object by name.            pv=trident 
INFO Deleted PV.                                   pv=trident 
FATA Install failed; exit status 1; Error: could not get version. 500 Internal Server Error 
command terminated with exit code 1; use 'tridentctl logs' to learn more 
[root@se1-ocpma-e100 trident-installer]# 

while the the container is running we got the following output inside the container

[root@se1-ocpma-e100 ~]# oc rsh  trident-cdd5fc7b4-ls8h4 
Defaulting container name to trident-main. 
Use 'oc describe pod/trident-cdd5fc7b4-ls8h4 -n netapp2' to see all of the containers in this pod. 
/ # tridentctl -s 127.0.0.1:8000 version -o json 
Error: could not get version. 500 Internal Server Error 
/ # 

the events regarding the namespace are

[root@se1-ocpma-e100 ~]# oc get ev 
LAST SEEN   FIRST SEEN   COUNT     NAME                                       KIND                    SUB                              MESSAGE 
1m          1m           1         trident-cdd5fc7b4-ls8h4.15284c6cb57af3b1   Pod                        scheduler                     Successfully assigned trident-cdd5fc7b4-ls8h4 to se1-ocpco-e142.sys.schwarz 
1m          1m           1         trident-cdd5fc7b4-ls8h4.15284c6cc51e36b5   Pod                         se1-ocpco-e142.sys.schwarz   MountVolume.SetUp succeeded for volume "trident-token-zx6zx" 
1m          1m           1         trident-cdd5fc7b4-ls8h4.15284c6cc6422647   Pod                         se1-ocpco-e142.sys.schwarz   MountVolume.SetUp succeeded for volume "trident" 
1m          1m           1         trident-cdd5fc7b4-ls8h4.15284c6d154ff9ec   Pod                     spe se1-ocpco-e142.sys.schwarz   Container image "netapp/trident:18.04.0" already present on machine 
1m          1m           1         trident-cdd5fc7b4-ls8h4.15284c6d17e80af1   Pod                     spe se1-ocpco-e142.sys.schwarz   Created container 
1m          1m           1         trident-cdd5fc7b4-ls8h4.15284c6d1dfb02a7   Pod                     spe se1-ocpco-e142.sys.schwarz   Started container 
1m          1m           1         trident-cdd5fc7b4-ls8h4.15284c6d1e1580f3   Pod                     spe se1-ocpco-e142.sys.schwarz   Container image "quay.io/coreos/etcd:v3.1.5" already present on machine 
1m          1m           1         trident-cdd5fc7b4-ls8h4.15284c6d21c24ec8   Pod                     spe se1-ocpco-e142.sys.schwarz   Created container 
1m          1m           1         trident-cdd5fc7b4-ls8h4.15284c6d27f171b5   Pod                     spe se1-ocpco-e142.sys.schwarz   Started container 
1m          1m           1         trident-cdd5fc7b4.15284c6cb4e7e7c1         ReplicaSet                 et-controller                 Created pod: trident-cdd5fc7b4-ls8h4 
1m          1m           1         trident.15284c6a2984d474                   PersistentVolumeClaim      ntvolume-controller           no persistent volumes available for this claim and no storage class is set 
1m          1m           1         trident.15284c6cb37d0c52                   Deployment                 nt-controller                 Scaled up replica set trident-cdd5fc7b4 to 1