Are there any common mistakes in PATH configuration that cause the 'node command not found' error?

Yes, several. One is mis-typing the path, like `node` instead of `/usr/bin/node`. Another is not adding the correct directory. Adding the wrong path or an outdated one will still cause an error. Also, forgetting to reload the shell after modifying the PATH (e.g., by not restarting the terminal or sourcing your shell configuration file) is a common mistake. Finally, some systems may have conflicting PATH entries – ensure your Node.js path appears earlier in the PATH than other potentially conflicting directories.