Verify Accessibility: Ensure that the Nginx Plus server instance is accessible from the Applications Manager server.
Check Host and Port: Make sure you’ve entered the correct host and port number for your Nginx Plus server.
SSL Configuration: Retry adding the monitor with the "SSL is enabled" option set to both enabled and disabled states.
Test Nginx server API Accessibility: Verify that the Nginx Plus server API (http(s)://[HOST]:[PORT]/api/1/nginx) is accessible from the Applications Manager server.
Proxy Server Configuration: If your environment requires the use of a proxy server to access the Nginx Plus server API, configure the proxy in Applications Manager. Click here to learn how to configure the proxy. Bypass Proxy for Nginx Plus server: If you have configured a proxy in Applications Manager but want to bypass it for the Nginx Plus server host/IP, add the host/IP under the "Do not use proxy for addresses beginning with" section in the "Configure Proxy" page: Navigate to Settings > Product Settings > Proxy Server Settings.
Check Authentication Details: If authentication credentials are missing or incorrect, you’ll encounter an authentication error. To resolve this:
Enable the "Is Authentication Required" option in the monitor configuration page.
Provide the correct authentication credentials.