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  • That’s an error in a plugin/theme that’s causing that. it’s not a bug in WordPress.

    I have seen that a lot on here and in my sites. What it means is that somewhere there’s a call to add_action() that is trying to use an invalid callback function of seo_footer. Just from the name of that it will either by a plugin that does the SEO work, or the theme trying to do it itself.

    The way to find out what is causing this is the deactivate all (yes all) plugins, and switch to the default theme. From there re-enable everything one-by-one. After re-enabling one, check the site and see if you get that error. If you do, that’s the one that’s causing the problems. if it’s not the one causing the problem keep moving on until you find it.

    Thread Starter haopro

    (@haopro)

    thanks you, I discovered plugin Mobile theme switch has caused this error causes

Viewing 2 replies - 1 through 2 (of 2 total)

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