CAC Error Code Reference
27 common CAC errors with plain-English fixes. Click any code for details.
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Error 38
CAC invalid, revoked, or expired
Error 53
CAC certificates revoked
Error 107
ERR_SSL_PROTOCOL_ERROR (Chrome)
Error 117
ERR_BAD_SSL_CLIENT_AUTH_CERT
Error 141
ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED (Mac Chrome)
Error 310
ERR_TOO_MANY_REDIRECTS
Error 400
HTTP 400 Bad Request after PIN
Error 403.7
SSL client certificate required
Error 500
Internal Server Error / certificate revoked
Error 1316
Network error reading installer file
Error 1321
Installer insufficient privileges
Error 1327
Invalid drive X:
Error 1500
Another installation in progress
Error 1603
Fatal error during installation
Error 1719
Windows installer service could not be accessed
Error 1722
Problem with Windows Installer package
Error 1920
Smart card service failed to start
Error 2738
Could not access VBScript runtime
Error 2755
Server returned unexpected error 110
Error 4012
CAC not found in reader (PIV activation)
Error 4015
Timeout (PIV activation)
Error 4020
Middleware not installed
Error 5011
PIV EndPoint interface (PIV activation)
Error 12221
Webmail error (Mac/Windows)
Error 100001
Adding DoD certs to Mac
Error 2148073485
Adobe — Key does not exist
Error 2148073497
Adobe — Keyset not defined