Error map
Clock skew too great Kerberos: Clock skew too great (KRB_AP_ERR_SKEW)
Authentication · layer 4, Application & API
Centre: this error. First ring: errors it is linked with (8). Outer ring: what those are linked with. Colours show the layer of a request each error belongs to. Click any dot to re-centre the map on it; hover to follow its connections. The centre dot opens the error page.
Directly related (8)
AWS Cognito: NotAuthorizedException: Incorrect username or password
Cognito rejected the sign-in — wrong credentials, a disabled user, an auth flow not enabled on the app client, or an expired refr…
AWS Cognito: NotAuthorizedException: Unable to verify secret hash for client x
The app client has a client secret, so every request needs a SECRET_HASH — and it’s missing or computed wrongly.
Two-factor (TOTP) code invalid / Invalid verification code (authenticator app time drift)
The 6-digit authenticator code is rejected — usually because the phone’s or server’s clock is off, or the secret was enrolled twi…
bcrypt error: Illegal arguments: undefined, string / data and salt arguments required / data and hash arguments required
bcrypt.compare/hash received undefined — the password field or stored hash wasn’t passed.
NotBeforeError: jwt not active (nbf claim in the future)
The token’s nbf (not before) time is in the future for the verifying server — usually clock skew between servers.
AWS Cognito: UserNotConfirmedException: User is not confirmed.
The user signed up but hasn’t confirmed their account (email/SMS code), so Cognito won’t let them sign in.
LDAP: error code 49 - 80090308: LdapErr: DSID-0C09042F, comment: AcceptSecurityContext error, data 52e
Active Directory/LDAP rejected the bind — the data code tells you why (52e wrong password, 525 user not found, 532 password expir…
SAML: Invalid SAML response — signature validation failed / audience mismatch / response expired (NotOnOrAfter)
The service provider rejected the IdP’s SAML assertion — wrong certificate, Audience/Entity ID mismatch, ACS URL mismatch, or clo…
Two steps away (18)
Git: Permission denied (publickey). fatal: Could not read from remote repository.
SSH authentication to GitHub/GitLab/Bitbucket failed — no key, wrong key, or the key isn’t added to your account.
Azure AD (Entra ID): AADSTS700016 Application not found in the directory
The client ID in your sign-in request doesn’t exist in the tenant you’re authenticating against.
HTTP 401 Unauthorized
The request has no valid authentication credentials — you need to log in or send a valid token.
OAuth 2.0 Error: invalid_client
The OAuth server couldn’t authenticate your application — wrong client ID/secret, wrong auth method, or the client doesn’t exist…
{"message":"Missing Authentication Token"} / No authorization token was found
The request reached a protected endpoint without credentials — or, on AWS API Gateway, it hit a path/method that doesn’t exist.
WebAuthn / Passkeys: NotAllowedError: The operation either timed out or was not allowed
The browser refused the passkey/WebAuthn ceremony — the user cancelled, it timed out, no matching credential, or the call wasn’t…
Azure AD (Entra ID): AADSTS50076 / AADSTS50079 — multi-factor authentication required
A Conditional Access policy requires MFA, but the sign-in flow (often a script, legacy client or ROPC password grant) can’t compl…
API Error: Missing required parameter (parameter_missing / "x" is required)
The API rejected the request because a field it requires — in the query string, path, headers or JSON body — wasn’t sent or was e…
AADSTS50055: The password is expired
The user’s password expired under the tenant/on-prem password policy and must be changed before signing in.
WebAuthn: SecurityError: The relying party ID is not a registrable domain suffix of, nor equal to the current domain
The rp.id in the WebAuthn options doesn’t match the page’s domain (or a parent domain), so the browser rejects it.
JWT Expired / Invalid Token
The JSON Web Token sent with the request is expired, malformed or signed with a different key, so the API rejects it (usually wit…
invalid_token: The access token is invalid (JsonWebTokenError: invalid signature / jwt malformed)
A token was sent but the server couldn’t verify it — bad signature, malformed, revoked, or issued for another audience or environ…
JsonWebTokenError: jwt must be provided
jwt.verify() was called with an empty value — the token never reached the server code.
SES MessageRejected: Email address is not verified. The following identities failed the check in region
SES refused to send because the From address/domain isn’t verified — or the account is still in the SES sandbox, where recipients…
Firebase Auth: auth/invalid-credential (auth/wrong-password, auth/user-not-found, auth/invalid-login-credentials)
Firebase rejected the email/password sign-in — wrong password, no such user, or a provider credential that’s malformed/expired.
Supabase Auth: AuthApiError: Email not confirmed
The account exists, but email confirmation is enabled and the user hasn’t clicked the confirmation link.
The trust relationship between this workstation and the primary domain failed
The computer’s machine account password no longer matches Active Directory, so domain logins fail.
AADSTS50020: User account from identity provider does not exist in tenant and cannot access the application
The signed-in user belongs to another tenant (or is a personal Microsoft account) and isn’t a guest in the app’s tenant.
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