I've solved it, but downgrading my dependencies to 5.3.0. The integration of Form Builder into Guvnor, in the 5.4 version, does not work properly. ¿?
Diffing versions, in the 5.4 the project jbpm-gwt-form-builder has moved, maybe for UberFire integration reasons?
https://github.com/droolsjbpm/jbpm/tree/5.3.x/jbpm-gwt
VS
https://github.com/droolsjbpm/jbpm/tree/5.4.x/jbpm-gwt
No suggestions?
Thanks!.
Jose.