After submitting, download and open your application printout — check that your photo and signature are clearly visible.
Most portals show an application status page where defects like a rejected photo are flagged.
If the photo is rejected, the body usually opens a short window to re-upload it in the correct format.
Use a recent passport-size photo and sign in dark ink on white paper, scanned at the specified size.
Fix any defect before the correction window closes, or the form can be rejected.