No, just because the SSC CGL application form displays an error during filling out does not mean that your candidature will be automatically cancelled.
The primary reasons for these errors, if you have already correctly completed **One-Time Registration (OTR)**, are typically browser problems, server overload, or small data entry errors.
After deleting your browser's cache, using a different browser (ideally Chrome or Firefox), or applying during off-peak hours, you can try again.

If the problem persists, you can email the regional SSC office with your registration ID and error screenshot, or you can submit a ticket via the **SSC helpdesk**.
Your candidature is safe as long as you apply before the deadline and your OTR is valid.