This issue is being represented only on server-side and not localhost.
When submitting a simple form with one textarea containing the two keywords "select" and "from" in this order, or even separated with multiple words; the form submission is showing the following error:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.
This error has been generated even with the following sentence: "The selection of this team will be from the list ...", since "selection" contains the word "select" in it and followed by "from" keyword.
The only temporary solution is to use "select" or "from" capitalized to prevent the internal server error. However, this is not what I need. I need to solve it with a reasonable solution.
This is usually caused by the firewall of your server. To solve it you need to check the error log file and see what is the error provided, then you will have to add an exception for this error. If you find it hard to be done, you can contact the support of your server and they can do it for you. Hope this can help.