Fix bug of incorrect validations, of null properties
Fix bug of incorrect validations, of null properties

Tribu-Anal/Vinculacion-Front-End,Tribu-Anal/Vinculacion-Front-End,Tribu-Anal/Manejo-Horas-de-Vinculacion-UNITEC,Tribu-Anal/Manejo-Horas-de-Vinculacion-UNITEC