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Fixing Divi Booster Warning: mkdir(): Permission denied Error

Written by Dan Mossop

If you're very unlucky, when you install Divi Booster you may be met with a "mkdir(): Permission denied" warning.

This is a result of the file permissions set on the /wp-content/uploads directory within your WordPress installation. Divi Booster needs the write permission to this folder, or it is not able to save the CSS and JavaScript files it creates (wp_head.css and wp_footer.js). If the server has been configured to deny write access to this directory, then Divi Booster will be unable to save its files and will generate the error above.

To fix this, please ensure that the /wp-content/uploads directory is writable. This can be done by setting the permissions level on the folder to 755 (or similar). You should be able to set the permissions on the folder using either an FTP program, through your web host file manager, or using a WordPress security plugin (you may already have a security plugin installed which is restricting the permissions in the first place).

For more information on file permissions within WordPress and how to change them, please see: Changing File Permissions

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About Dan Mossop

Dan is a Scottish-born web developer, now living in Brisbane with his wife and son. He has been sharing tips and helping users with Divi since 2014. He created Divi Booster, the first Divi plugin, and continues to develop it along with 20+ other Divi plugins. Dan has a PhD in Computer Science, a background in web security and likes a lot of stuff, 

2 Comments

  1. Reza on January 9, 2022 at 10:51 am

    Thank you! This tutorial saved my website!

    Reply
    • dan on January 10, 2022 at 12:21 am

      Hey Reza, I'm glad it helped, and sorry you encountered the issue in the first place!

      Reply

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