Are you seeing at front end or back end?
You need to run a plugin conflict test. Deactivate all plugins, and then activate one by one and check which one is causing this issue.
If it helps any, this is due to a faulty meta box definition (or something corrupting it). var_dump the global $wp_meta_boxes and determine which box has no ‘callback’ key or an invalid value.
Between knowing the guilty plugin by Ashok’s method and knowing which meta box is flawed, it should be possible to zero in on the faulty code.
Thread Starter
arun.s
(@aruns-1)
getting this error on category selection tab at ADMIN section
Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in /home/blog14/public_html/wp-admin/includes/template.php on line 928
I have already deactivated all plugins, and activate one by one but nothing to show any changes.
In which page i have to change to resolve this issue.
and one more question:
If i change or migrate current theme to another existing theme.
Is site is working as earlier or made some change in any page???
Plz suggest me.
The problem could also be your theme, try switching to one of the default “twenty*” themes. You might have to clear your browser cache to see some changes. Changing themes should not alter any core files. Any that do would not be allowed on the WP repository, but it’s possible some themes not in the repository would change core files even though it’s considered extremely bad practice.
It’s impossible to say how to fix the error just from the error message. The call is coming from a bad or corrupted metabox definition, but we do not know which one. You might get a better clue by installing a backtracing error handler.
