"to brick up" in Spanish

Context examples for "to brick up" in Spanish(!) These sentences come from external sources & may not be accurate. Therefore, we are not responsible for their content.
Too many students come up against brick walls in their attempt to have their qualifications validated by the authorities in the various Member States.
Los mecanismos actuales son opacos. Demasiados estudiantes chocan con un muro cuando se dirigen a las administraciones de los Estados miembros para obtener la convalidación de su formación.