admin-ajax.php file missing

  • Hi all,

    My main problem is that I am missing the admin-ajax.php file in the wp-admin/ folder. I noticed it when I repeatedly was not able to upload a picture to a post. So I used the “Developer tools” in the google Chrome browser to identify the problem and I got following message:

    “https://www.ursmuehlematter.ch/wp-admin/admin-ajax.php Failed to load resource: the server responded with a status of 404 (Not Found)”

    The file is not visible using an FTP program (show hidden files activated)
    I tried to reinstall my theme (Pixelgrade/lens) but the same error appears.
    The problem is reproducible in firefox, edge, chrome.
    It did not solve even tough I deactivated all plugins.

    Is there any easy way to restore that file/solve my problem.

    Thank you for any help,
    captcoma

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  • admin-ajax.php is part of WordPress, not your theme. Since you can’t tell what else might be missing, consider reinstalling WordPress using the “Resinstall-now” button in Admin page > Dashboard > Updates. If you are experiencing other unusual behaviour this may be a sign you’ve been hacked.

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