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Fix DSC (Digital Signature Certificate) Error in GST

By 99Digital Signature on Jul, 28 2025

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GST emSigner error

  • emSigner Not Started / Not Running
  • Ensure emSigner is installed on your system. 
  • Run emSigner as Administrator
  • Right-click the emSigner shortcut → Run as Administrator
  • Open http://127.0.0.1:1585 in your browser to verify it's running.
  • Check that port 1585 or 2095 is not blocked by antivirus/firewall.

 

Digital Signature Certificate Not Detected

  • Ensure the USB DSC token is properly inserted.
  • Install the latest DSC drivers (e.g., Hyp2003, ProxKey, TrustKey).
  • Use Internet Explorer (11) or Chrome with old security settings, as newer versions may restrict Java applets and plugins.
  • Open emSigner and refresh the GST page before signing.
  • Ensure your DSC is registered on the GST portal
  • Log in to GST portal → Dashboard → Register/Update DSC
  • Follow the registration process
  • Check your DSC validity period
  • Try a different USB port

Java Issues

  • Install Java 8 (recommended version).
  • Configure Java security settings to allow GST portal
  • Clear Java cache.

Windows-Specific Fixes

  • Use Windows 7/10 (64-bit), preferably.
  • Browser Google Chrome
  • Internet Explorer 11 (preferred for DSC)

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