412412 Precondition Failed
One or more conditions specified in the request headers evaluated to false on the server.
500The server encountered an unexpected condition that prevented it from fulfilling the request.
An unhandled exception or crash occurred on the server. Common causes include bugs in application code, database connection failures, null pointer exceptions, misconfigured services, or resource exhaustion.
Check the server logs for the stack trace and error details. Fix the underlying bug, handle exceptions properly, and ensure all dependencies (database, cache, external services) are operational. Add error monitoring to catch these issues early.
// Check server logs for the stack trace
console.error('Internal server error:', error.stack);412One or more conditions specified in the request headers evaluated to false on the server.
205The server tells the client to reset the document view, such as clearing a form after submission.
101The server is switching protocols as requested by the client via an Upgrade header.
102The server has received and is processing the request, but no response is available yet (WebDAV).
428The server requires the request to be conditional to prevent the 'lost update' problem.
208The members of a DAV binding have already been enumerated in a previous part of the response, and are not included again.