openerp.web.form.Field is invalid

Hi guys, i have started to work on version 7 of Geospatial Addons, but i'm not a very good Java developer so when i update the base_geoengine module it raise me an error with "openerp.web.form.Field is invalid" when the /base_geoengine/static/src/xml/geoengine.xml file is loaded and the browser page is empty, so if could give a suggestion how to change this behaviour i will be very glad. i will propose for merging the modified code.

I will not load the *.js files, css and xml the page will be displayed.