foswiki editchapterplugin error

ERROR: (404) Invalid REST invocation - /RenderPlugin/template does not refer to a known handlerContent-Length: 95 Status: 404 Content-Type: text/html; charset=iso-8859-15 Set-Cookie: FOSWIKISID=cfd742cf9614ce8f3db16862ba501925; path=/; HttpOnly Set-Cookie: FOSWIKISID=cfd742cf9614ce8f3db16862ba501925; path=/; HttpOnly ERROR: (404) Invalid REST invocation - /RenderPlugin/template does not refer to a known handler