An invalid request on Facebook usually occurs when the Facebook server is down. It is rarely a permanent issue, and is usually fixed quickly.
A "server certificate expired" message indicates that the SSL/TLS certificate used to secure communications between a server and a client has reached its validity period and is no longer trustworthy. To overcome this issue, the server administrator should obtain a new certificate from a trusted Certificate Authority (CA) and install it on the server. Additionally, it’s important to ensure that future certificates are renewed before they expire to maintain secure connections. Regular monitoring of certificate expiration dates can help prevent this issue from occurring.
An "invalid certificate" on your DSI (Digital Secure Identifier) typically indicates that the digital certificate used to authenticate a connection is either expired, not trusted, or has been revoked. This can prevent secure communication and may expose your data to security risks. To resolve this issue, you may need to update the certificate, check your device's date and time settings, or install a trusted certificate authority's root certificate. It's important to address this promptly to maintain the integrity and security of your connections.
The mechanism used to distribute information about invalid certificates is called certificate revocation. This is typically done through certificate revocation lists (CRLs) or online certificate status protocol (OCSP) servers. These mechanisms allow clients to check the status of a certificate and determine if it has been revoked by the certificate authority.
A "bad request" typically refers to an error message indicating that the server cannot process the request due to client-side issues, such as malformed syntax or invalid request parameters. In HTTP terms, it corresponds to a 400 status code, signaling that the server considers the request to be invalid or improperly formatted. This often occurs when the client sends data that the server cannot understand or when required information is missing.
In the computer networking setup, a default gateway connects a local network to the internet. The default gateway error generally refers to an error code where one server receives an invalid response from another server.
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Having a secure server certificate for your website would mean that all data that goes in or out would be secure from hackers. It is helpful for websites like online banking, or paypal.
Request and install a server certificate for your web server software
I just started with me too - I had a couple of transactions with FaceBook today but all of a sudden I get the certificate invalid popups.
Proxy ErrorThe proxy server received an invalid response from an upstream server.The proxy server could not handle the request Special:Wysiwyg.Reason: Error reading from remote server
You have either put in your username or password wrong.