When I try and enable the Confluence Source Editor plug-in I get an error and the Source Editor Configuration Manager and Atlassian Source Editor Javascript Resources stay disabled.

I get the following error in the logs.

2012-05-29 18:18:50,947 ERROR [http-8080-1] [jersey.spi.container.ContainerResponse] write A message body writer for Java class com.atlassian.plugins.rest.common.Status, and Java type class com.atlassian.plugins.rest.common.Status, and MIME media type text/html was not found
– url: /rest/plugins/1.0/com.atlassian.confluence.plugins.editor.confluence-source-editor-key | userName: cyaeger | referer: http://confluence.dscs.com:8080/plugins/servlet/upm
2012-05-29 18:18:50,947 ERROR [http-8080-1] [jersey.spi.container.ContainerResponse] write The registered message body writers compatible with the MIME media type are:
text/html ->
com.atlassian.upm.rest.representations.HtmlWrappedJsonProvider
/ ->
com.sun.jersey.core.impl.provider.entity.FormProvider
com.sun.jersey.core.impl.provider.entity.StringProvider
com.sun.jersey.core.impl.provider.entity.ByteArrayProvider
com.sun.jersey.core.impl.provider.entity.FileProvider
com.sun.jersey.core.impl.provider.entity.InputStreamProvider
com.sun.jersey.core.impl.provider.entity.DataSourceProvider
com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General
com.sun.jersey.core.impl.provider.entity.ReaderProvider
com.sun.jersey.core.impl.provider.entity.DocumentProvider
com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider
com.sun.jersey.core.impl.provider.entity.SourceProvider$SourceWriter
com.sun.jersey.server.impl.template.ViewableMessageBodyWriter
com.sun.jersey.json.impl.provider.entity.JSONJAXBElementProvider$General
com.sun.jersey.json.impl.provider.entity.JSONWithPaddingProvider
com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General
com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider$General
com.sun.jersey.json.impl.provider.entity.JSONListElementProvider$General
com.sun.jersey.json.impl.provider.entity.JacksonProviderProxy