Examine the log file stored on the host

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The log file is quite large, but if you spend time studying it, you will accurately identify the villain, correlating the moment of his appearance on the site with the time of malicious changes, and then you can easily block him.

You can also restrict access to critical directories. In Joomla, this includes the Libraries folder.

Create an .htaccess file and specify the following parameters in it:

Order allow deny

Deny from all

The file must be placed in a folder with restricted travel agency email list access. After that, upon request, which specifies the site name followed by /Libraries, the user will be sent the message "Error 403 disallowed useragent".

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Hosting is unavailable
Often, a 403 server error can occur if there is no access to the hosting, which may be blocked by the provider itself for a specific user. This is most often due to a violation of technical requirements or conditions of the hosting agreement. As a rule, before blocking, an email is sent with a warning and an indication of its reasons, time is given to eliminate the deficiencies. After the expiration of the term, if the violations are not eliminated, blocking occurs.

Hosting is unavailable

Therefore, first of all, you need to check your email and find a letter with the appropriate content, and then fulfill the provider's requirements specified in it. If such a message is not found, then most likely the cause of the problem lies elsewhere.

Disabling WordPress Plugins
If you still can't figure out why the 403 error is appearing, there's a chance that there's a problem with your WordPress plugins. They may not be working or compatible with the site settings you've specified.

In this case, you should first try to disable the plugins. To do this, go to the "Wp-content" section and find the "Plugins" folder in it. Rename it, after which the site will not be able to detect and load the previously specified plugin. Now open the page again. If it loads, then the problem was in the plugins. All that remains is to find out which of them caused the problems. To do this, you can return the previous names to the folders, and then disable each one separately in a similar way. When the problematic plugin is detected, it must be reinstalled or replaced with another.