Usually this happens when a plugin or an active theme is not allowing
WordPress to properly execute the code in the footer area of your
website. This code is triggered with the function . When a theme is
missing this code, or a plugin does something that messes it up, then
you will end up with a missing WordPress admin bar issue.
Fixing the Missing Admin Bar
The most common culprit causing this problem is a missing line in your theme. This function is usually found in a theme’s footer.php file just before the
tag. Before you do anything to fix it, make sure you create complete
WordPress backup or at least backup your theme files. Connect to your
website using an FTP program like Filezilla, or use the File Manager in
your web hosting account’s cPanel dashboard. Next, go to your theme
folder which is located inside /wp- content/theme/ folder and download a
copy of your theme’s folder to your Desktop as backup. You would need
to locate the footer.php file inside your theme folder and scroll down
to the end of the file to see if you have line before the tag. If you
do not have this line, then you need to add it and then upload the
changed file back to your server. If you are using a child theme and
your child theme does not have a footer.php file, then you need to check
the parent theme’s footer.php file to locate the wp_footer function. If
adding the wp_footer() function to your theme does not solve the
missing admin bar issue for you, then don’t worry there are other things
you can do to troubleshoot this error.
Troubleshooting
Temporarily switch back to a default theme. Sometimes you may see
wp_footer function in your theme files, but the admin bar still might
not work. In this case, you need to switch to a default theme to make
sure that your current theme is not causing this issue.

A poorly coded plugin can cause this error as well, so to check if a
plugin has caused this issue, you need to deactivate all plugins on your
WordPress site. If this resolves your problem, then this means that
there was a plugin that caused this issue. Now you need to figure out
which plugin caused this issue. You can do this by reactivating your
plugins one by one until you find the plugin that caused the issue.
Lastly, you can turn the debugging on by opening wp-config.php file and
changing define (‘WP_DEBUG’, false); to define (‘WP_DEBUG’, true); .
WordPress will now show you warnings and notices that were previously
hidden. These warnings and notices can hint towards the file causing
this issue.
Conclusion
That’s all, we hope this article helped you fix missing admin bar
issue in WordPress. You may also want to check out our guide What
everybody ought to know about the WordPress admin bar.
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