ajax-handler.php file missing in folder

Can you explain the error? Are you seeing an error page?

Hi,

Thanks for the response

I use query monitor plugin and it throws up this error (see screen shot) but when I look of the ajax-handler file to check the permissions I just cant find it in the wp-content folder. Here is a screen shot

https://paste.pics/e2ff9736e27afa6acc5bcd5bb4079a16

The caller column throws a hint. It looks like it is an error of the Advanced Ads Tracker plugin.

Thanks for that. But the question still remains how come I cant see the ajax-handler file in the wp-content folder? Where could it be?

I suggest you to contact the plugin’s developer. If you check the core WordPress files, you won’t find it either.