Fix an infinite recursion caused by missing plugin

When a MissingPluginException has caught when rendering an exception,
we should disable the plugin as needed to prevent an infinite recursion.
Merge pull request #3913 from chinpei215/master-exception-renderer-fix

Fix an infinite recursion caused by missing plugin
Update Model.php

Fixed the case on the link to the book, to match the anchor in the page.
Merge pull request #3925 from davidyell/patch-1

Update Model.php