Warning message in node startup output related to JenkinsCapabilityMatcher

Seeing this when I startup a node with the Selenium plugin.
`WARNING: error getting the parameters from the hub. The node may end up with wrong timeouts.Error with the JSON of the config : String hudson.plugins.selenium.JenkinsCapabilityMatcher could not be coerced to class: java.lang.Class`

Just once when the selenium server has started and is registering to the Hub. Doesn't seem to affect anything, but it might for some people or it could be affecting something I am not seeing. I am not using a custom JSON configuration for the node in the selenium plugin node configuration.