• Just completed an installation, went to run the install.php and was returned with this error:

    Fatal error: Call to undefined function: add_filter() in /homepages/…/wp-includes/default-filters.php on line 20

    Advice welcome.
    Thanks

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  • I got same problem now.

    “call to undefined function” almost always means all of the files didn’t get uploaded.
    Upload them all and try the install again. Make sure all of the files are there and none are zero byte.

    Use Filezilla
    It’s the easiest and most reliable ftp client

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