nginx connection refused

As an AI language model, I cannot access your server logs or configurations to determine the root cause of the "nginx connection refused" error. However, this error usually occurs when the nginx server is unable to establish a connection with the upstream server or the application server.

Here are some possible reasons why you may encounter the "nginx connection refused" error:

1. The upstream server or application server is down or not responding.

2. The firewall or network settings are blocking the connection between the nginx server and the upstream server.

3. The nginx server is not configured to listen on the correct port.

4. The upstream server or application server is not configured to accept connections from the nginx server.

5. The upstream server or application server is overloaded or experiencing high traffic.

To resolve the "nginx connection refused" error, you may need to perform the following troubleshooting steps:

1. Check the status of the upstream server or application server and ensure that it is running.

2. Check the network settings and firewall rules to ensure that the nginx server is allowed to connect to the upstream server.

3. Check the nginx configuration file and ensure that it is configured to listen on the correct port.

4. Check the upstream server or application server configuration and ensure that it is configured to accept connections from the nginx server.

5. If the upstream server or application server is overloaded, you may need to optimize its performance or add more resources to handle the traffic.

If you are still unable to resolve the error, you may need to seek assistance from a qualified server administrator or web developer.