SSL / TLS Errors
SSL (Secure Sockets Layer) and TLS (Transport Layer Security) errors happen when a user's browser cannot establish a secure connection with the server. These are critical errors that often block access to a site entirely to protect the user. Common causes include expired certificates, mismatched domain names, or outdated protocol versions.
Dealing with SSL / TLS Errors can be frustrating, but they are often just the system's way of telling you exactly what went wrong. Security warnings are critical safeguards. They appear when encryption fails, certificates are invalid, or permissions are denied. Never ignore these, as they often protect your data from being intercepted. In this section, we break down each error code into simple, actionable steps for both casual users and system administrators.
Errors in this Category
ERR_SSL_PROTOCOL_ERROR
This error occurs when the browser cannot establish a secure connection to the server due to an issu...
NET::ERR_CERT_AUTHORITY_INVALID
This error means the browser does not trust the Certificate Authority (CA) that issued the website's...
ERR_CERT_DATE_INVALID
The ERR_CERT_DATE_INVALID error occurs when the browser detects that the website's SSL certificate h...
ERR_CERT_COMMON_NAME_INVALID
This error indicates a mismatch between the domain name in the address bar and the domain name liste...
ERR_BAD_SSL_CLIENT_AUTH_CERT
This error occurs when the server requires a client certificate for authentication (mutual TLS), but...
ERR_SSL_VERSION_OR_CIPHER_MISMATCH
This error happens when the browser and the server cannot agree on a common encryption protocol (SSL...
ERR_CERT_REVOKED
The ERR_CERT_REVOKED error indicates that the website's SSL certificate has been explicitly revoked ...
ERR_SSL_OBSOLETE_VERSION
The ERR_SSL_OBSOLETE_VERSION error is a security warning in Chrome indicating that the website is us...
NET::ERR_CERT_WEAK_SIGNATURE_ALGORITHM
The NET::ERR_CERT_WEAK_SIGNATURE_ALGORITHM error occurs when the website's SSL certificate was signe...
ERR_CERT_UNABLE_TO_CHECK_REVOCATION
The ERR_CERT_UNABLE_TO_CHECK_REVOCATION error indicates that the browser tried to verify if the webs...
ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN
The ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN error occurs when HTTP Public Key Pinning (HPKP) fails. The...
kCFURLErrorSecureConnectionFailed on macOS
The kCFURLErrorSecureConnectionFailed error on macOS signifies that the system was unable to establi...
Server Certificate Untrusted
The kCFURLErrorServerCertificateUntrusted error in macOS indicates that the system's trust store doe...
Certificate Authority Invalid
This error indicates that the Android device does not trust the Certificate Authority (CA) that sign...
Mastering SSL / TLS Errors
To effectively troubleshoot SSL / TLS Errors, it is essential to look beyond the error message itself. Most of these issues follow a predictable pattern. Isolating the variable is key. Is it happening on all devices? Is it specific to one browser? Answering these questions will narrow down the root cause.
Our database is constantly updated with the latest solutions and workarounds. By understanding the technical nuance behind each code, you can prevent future occurrences and maintain a healthy, accessible digital environment.