Troubleshooting WordPress Failed to Open Stream Errors

The error is typically caused by missing core files or incorrect file permissions, which can be resolved by re-uploading files or resetting permissions. medium confidence based on 7 community reports

The error is typically caused by missing core files or incorrect file permissions, which can be resolved by re-uploading files or resetting permissions.

Based on 7 community reports.

Linked sources: 7.

Known Issues

Missing core files in wp-includes
Incorrect directory permissions (644/755)
Faulty one-click installer configurations
Broken file paths in custom scripts

Community Q&A

What causes the WordPress failed to open stream error?

This error usually indicates that a required PHP file is missing, corrupted, or inaccessible due to incorrect server file permissions.

How do I fix missing WordPress core files?

You can fix this by downloading a fresh copy of WordPress from WordPress.org and re-uploading the missing files via FTP or your hosting file manager.

What are the correct file permissions for WordPress?

Generally, directories should be set to 755 and individual files to 644 to ensure the server can read them while maintaining security.

Can one-click installers cause this error?

Yes, some hosting one-click installers may fail to copy all files correctly or inject conflicting headers, leading to stream errors.

Reddit Sources

Error when attempting to login to wordpress as admin (r/Wordpress)
Reasons for these errors? (r/Wordpress)
File download only for specific users (r/Wordpress)
Backup restoration failed :-( (r/Wordpress)
I’ve faced a problem when accessing the site I created (r/Wordpress)
Failed to open stream. No such file or directory… (r/Wordpress)
Why wpdb not working? (r/Wordpress)