It looks like you're encountering a Ruby exception related to file permissions. The error message indicates that the parent directory of "/tmp/passenger.h8oxja" has incorrect permissions. Specifically, it's saying that the parent directory is world-writable, which is usually considered a security risk.

Here are a few steps you can take to resolve this issue:

1. Check and Adjust Parent Directory Permissions:

   • Use the ls -ld /tmp command to check the permissions of the /tmp directory. It should not be world-writable.
   • If the permissions are incorrect, you can change them using the chmod command. For example, sudo chmod 1777 /tmp will set the correct permissions for the /tmp directory.

2. Check Ownership:

   • Make sure that the /tmp directory is owned by the appropriate user (usually root) and has the correct group ownership.

3. Review File Creation Process:

   • If you're responsible for creating this file or directory, ensure that the creation process sets appropriate permissions. You might want to review the code that's creating these directories and files.

4. Consider Using a Different Directory:

   • If possible, consider using a different directory for your application's temporary files if the /tmp directory is problematic.

5. Check for Existing Locks:

   • It's also possible that there is an existing lock file in the directory that is causing issues. Check if there are any files or directories in /tmp that are causing conflicts.

6. Check Disk Space:

   • Ensure that there is enough disk space available on the filesystem that contains /tmp. If the disk is full, it can cause various issues.

7. Verify User Permissions:

   • Make sure the user running the application has the necessary permissions to read, write, and execute in the relevant directories.

8. Verify Ruby and Gem Versions:

   • Ensure that you're using compatible versions of Ruby and any gems or libraries you're using. There might be compatibility issues with certain versions.

9. Check for System or Environment Changes:

   • If this issue suddenly appeared and was not present before, consider if there have been any changes to the system or environment that could be causing this problem.

Remember to exercise caution when changing permissions on directories, especially system directories like /tmp. Making them world-writable can be a security risk, so it's important to set permissions correctly. If you're unsure about the appropriate permissions, consult your system administrator or refer to your system's documentation.