It is usually accompanied by a message like page not found or The page you are trying to access does not exist.
MESSAGE 404 NOT FOUND CODE
PS: I suggest in the future you review downloaded files before installing them-not only to notice error messages, but also to see what they do (especially important if you don't fully trust the site its coming from, or if its served over HTTP instead of HTTPS), and if there is any customization needed for your particular setup. It is an HTTP response code that shows that the page that a user has requested has not been found. Yet not a single person using a website like CSS tricks would fail to get the meaning of this page.
In fact there is no text at all in the normal sense. According to the native php-cli on Ubuntu there is indeed no mysql extension. Cyberpanel just runs 'php' to access the php-cli. That file should be plain text you can use your preferred text editor on it (you should need to use sudo/sudoedit/etc. You can see there are no words like 404, error, not found etc. Litespeed obviously makes uses of lsphp binaries and not the native ones that would be installed on Ubuntu. If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. No indication is given of whether the condition is temporary or permanent.
MESSAGE 404 NOT FOUND DOWNLOAD
I'm guessing at some point you tried to download that configuration file from somewhere and instead wound up saving an HTTP error message. 10.4.5 404 Not Found The server has not found anything matching the Request-URI. Reads to me that you have a /etc/bash_completion.d/docker-compose that starts off with 404. We defy you to get to the end of his video without any part of your body clenching.
It features an excruciating piece to camera that just goes on and on. //etc/bash.bashrc:58 /usr/lib/command-not-found - 404: New York-based artist Steve Lambert describes this as 'the most awkward 404 not found page on the internet', and you know, he may well be right. //etc/bash_completion.d/docker-compose:1 404: Not Found This part of your bash -lxe output: ///usr/share/bash-completion/bash_completion:1981.