How to customize OSCLASS ERROR page

Please, I’m having issues with my site. I get this error from time to time " Osclass Error

Osclass database server is not available."
Please, I want to be able to customise the Message on the page. Which file do I open to be able to customise it? I have seen the CSS Style link: https://mywebsite.com/oc-includes/osclass/installer/install.css . div class = page-error
I want to write something like: "An error has occurred. Kindly refresh this page to continue"
What is the cause of the error? Could it be from the Web Host?

Thank you very much.
I have finally found the file. It is in DBConnectionClass.php
However, I can’t figure out the cause of the error. could you please assist me with that?

No one here to help you dear :sleeping: