Support » Fixing WordPress » Help! cannot login after update to 4.0

  • After updating to WordPress 4.0 I get the following error message when I try to login.

    Fatal error: Call to undefined function hash() in /home/oirm/blog/wp-includes/session.php on line 64

    How can I fix this to login. The actual blog is still working, but I cannot login to do any administration.

    Thanks,

    Scott Blackwell

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  • Chances are your server’s version of PHP is either too old, or doesn’t have the hash extension installed. You should ask your host about it.

Viewing 1 replies (of 1 total)
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