404 Page Not Found, plugin.php and permalinks (seem all related)

  • OK, I’m having a bit of a problem here.

    A few days ago, I started having this problem when trying to updates pages (not post, only pages):

    Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Array’ was given in …/wp-includes/plugin.php on line 473

    Warning: Cannot modify header information – headers already sent by (output started at …/wp-includes/plugin.php:473) in …/pluggable.php on line 890

    I tried deactivating all my plugins, but that didn’t change anything.
    The pages still get updated and posted, so I didn’t worry too much about it.

    But today, all my posts, pages, categories, tags and rss feed started to give a “404 page not found error”. It seems this happened after I selected “Summary” instead of “Full Text” in the reading options. But it may not be related.

    I then noticed I have the following error at the top of my Permalinks page:

    Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Array’ was given in …/wp-includes/plugin.php on line 473

    Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Array’ was given in …/wp-includes/plugin.php on line 166

    If I put my Permalinks back to the Default settings, everything seems to be working again.

    But when I put it back to custom (/%postname%/) then all the problems come back. I don’t understand why these problems now show up with the custom permalink settings as I’ve had this permalink setting since I created the blog.

    Is there anyway I can keep the permalink setting and not have these problems? Do I need to change something in the plugin.php file?

    I’m using the Templatic template Job Board.
    https://www.makode.com/en/

    Thanks in advance for any tips!

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  • Thread Starter mary

    (@maryse)

    OK, I now know what made the the Page not Found problem start… because I have the exact same site installed in another folder (same template, same plugins, etc. but in another language). As soon as I visited my permalinks page on that WordPress installation and the error mentioned above appeared at the top of that page.. then the 404 pages started showing up.

    I don’t know how to stop it except selecting the Default permalinks settings, which I don’t want…

Viewing 1 replies (of 1 total)
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