> ## Documentation Index
> Fetch the complete documentation index at: https://docs.joinmassive.com/llms.txt
> Use this file to discover all available pages before exploring further.

# What are the most common error codes and how do I fix them?

Here are the main error codes and their solutions:

1. Authentication Error (407):
   * Meaning: Your credentials are invalid
   * Fix: Verify your username and password format

2. Bad Request (400):
   * Meaning: Your request is malformed
   * Fix: Check routing parameters and request syntax

3. Disallowed Content (452):
   * Meaning: Request violates content policy
   * Fix: Check for prohibited ports or restricted protocols

4. Server Issues:
   * 500 (Internal Server Error): Wait and retry
   * 502 (Bad Gateway): Network couldn't find suitable proxy
   * 503 (Service Unavailable): Geotargeting too restrictive or high network demand