Regression - Fix the dropdown field "Employer" in "Job" document type

The employer drop down in "Jobs" document type is missing

1. Login to GOGREEN CMS
2. Navigate to Browse perspective >> Jobs folder
3. Create a Job document

Below exception is seen in the screen

An error has occurred, sorry for that.
java.lang.IllegalArgumentException: unknown type: DynamicDropdown
Failed to instantiate plugin class 'org.hippoecm.frontend.editor.plugins.field.PropertyFieldPlugin' for wicket id 'home.cluster.cms-static.plugin.servicesLoader.cluster.cms-services.plugin.hippostdEditorFactory.cluster.cms-editor.plugin.editorPlugin.cluster.default.right.item' in plugin 'home.cluster.cms-static.plugin.servicesLoader.cluster.cms-services.plugin.hippostdEditorFactory.cluster.cms-editor.plugin.editorPlugin.cluster.default.plugin.employer' (JcrPluginConfig:/hippo:namespaces/hippogogreen/job/editor:templates/default/employer)