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Troubleshooting the Care Identity Service

Information on issues related to the Care Identity Service, how to fix them and how to get more help.

Live service issues

Error 400_645

We are currently seeing an increase in users experiencing this error code. This can happen if NHS Credential Management is not installed or working properly and in some cases may be related to the deprecation of the Chrome extension.

If you are seeing error 400_645 please read this troubleshooting guidance.

Other Chrome extension issues

If you are experiencing other issues authenticating that you think are related to the NHS Chrome extension, you may be able to temporarily work around the issue using this guidance.



Troubleshooting smartcard management

Some users may have issues when trying to issue, print, unlock, cancel, renew or repair smartcards.

An example of this is:

  • Error: INF1014:Scanning for Smartcard ERR5022: Operation cannot be completed

Read detailed guidance on how to fix smartcard management issues.


Common issues across applications and services





















Report an issue

To report a bug or issue, go to the NHS Digital Customer Portal or email [email protected]

Last edited: 7 December 2024 11:07 am