Support » Fixing WordPress » Update to 5.2.2 fails on Windows IIS

  • Automatic update fails on Windows Server 2016 IIS with the following message :

    Update WordPress
    Downloading update from…

    Unpacking the update…

    Warning: copy(D:/Web Sites/Blogs/wordpress/wp-admin/includes/update-core.php): failed to open stream: Permission denied in D:\Web Sites\Blogs\wordpress\wp-admin\includes\class-wp-filesystem-direct.php on line 257
    The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.: wp-admin/includes/update-core.php

    Installation Failed

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  • Hi siadders,

    There is no write permission to that particular folder. Can you change the permission then update the WordPress or Other option to update the WordPress via hosting server or please update WordPress core files via FTP.


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