Ay, frustrating yan talaga, sis! Honestly, sa SSS online enrollment kasi minsan may technical glitches, so try clearing your browser cache muna or try a different browser altogether, a few of us had that issue din and it worked after that. If it's still not working, I'd suggest going to the nearest SSS branch personally para mag-enroll, kasi mas sure at pwede ka ring mag-tanong directly kung ano ang missing sa requirements mo.