Plug-in Marked As Incompatible

The remote plug-in does not display in the vSphere Client user interface.
The plug-in does not appear in the object navigator, but it is listed in the vSphere Client under
Admin
Client plugins
.
The plug-in is marked as incompatible in the compatibility matrix and is filtered out.
Plug-ins can be marked as incompatible with wild characters. The plug-in itself might not be marked as incompatible, but it matches a pattern in the compatibility matrix.
In the Management UI there is a signpost for the plug-in which contains an error message saying that the plug-in is marked as incompatible and can not be deployed:
The plug-in does not claim compatibility with the current vSphere Client version. Check plug-in's interoperability matrix.
  1. Open the
    /etc/vmware/vsphere-ui/compatibility-matrix.xml
    .
  2. Mark the plug-in with
    extension.key
    as compatible by adding:
    <PluginPackage id="extension.key" status="compatible"/>
    .