When trying to configure the Solution Add-On Landing Zone you have the behavior as per below screenshot and you cannot continue with the configuration:
Environment
VMware Cloud Director 10.6.0.1 VMware Cloud Director 10.6.1.1
Cause
This is a known issue in VMware Cloud Director. The reason the plugin does not upgrade is because the spooling area / transfer storage and the plugin upload gets disrupted while the VMware Cloud Director appliance upgrades.
Resolution
To work around the issue please follow the below steps to remove and re-upload the plugin manually via customize portal.
Here are the steps to recover the UI Plugin:
ssh to a Cloud Director primary cell.
Execute the following command: find /opt/vmware/vcloud-director/ -name 'cloud-director-solution*'
Expected result will look smiliar to: /opt/vmware/vcloud-director/system/com/vmware/vcloud/cloud-director-solutions/1.0.0/cloud-director-solutions-1.0.0.jar
Copy the jar file to your local desktop.
Extract the jar file using ZIP, if not prompted rename to cloud-director-solutions-1.0.0.zip
Navigate to <extracted path>/isoAddOns/***landing-zone***.iso
Mount ISO and navigate to <ISO mount point>ui/plugin.zip
Disable old plugins in VMware Coud Director.
Upload and active the new VMware Solution Add-On Management UI Plugin.