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It produced this output: Internal Server Error: The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.
My web server is (include version):nginx/1.18.0 (Ubuntu)
The operating system my web server runs on is (include version): Ubuntu 22.04 (LTS) x64
My hosting provider, if applicable, is: Dot Tech
I can login to a root shell on my machine (yes or no, or I don't know): No, it's disabled
I'm using a control panel to manage my site (no, or provide the name and version of the control panel):
The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot): certbot 1.21.0
Kindly note that the application has been running on the server over the past 3Months. None of the server configuration files has been modified within this period. Your support is highly appreciated.
Is that just something you see in your nginx log or are you actually getting an error from a browser?
Because various bots and scanners might make faulty requests intentionally and that can cause messages in your log. You don't need to worry about those.
Below is the error message I get on the client's side. "Internal Server Error: The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application."
I have tried with different clients, but same issue.
I actually get the error message below on the client-side. "Internal Server Error: The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application."
Many thanks for your support. My application is accessible now. I updated certbot according to @rg305 recommendation. I then restarted both the application server (gunicorn) and the web server (ngingx). The problem was then resolved.