Syntax errors in configuration files, such as missing semicolons or mismatched parentheses.
There is an error in the configuration file regarding the path: for example, the specified path doesn’t exist or has insufficient permissions.
Port conflicts in the configuration file: If the same port number is configured, it will prevent nginx from starting.
Incorrect redirection rules in the configuration file may prevent the website from being accessed properly.
Incorrect restrictions in the configuration file, such as mistakenly setting access limitations, can prevent certain users from accessing the website properly.
Incorrect cache settings in the configuration file may lead to a decrease in website performance.
Incorrect SSL certificate configuration in the configuration file may result in the website being inaccessible.
There is an error in the load balancing configuration in the configuration file: If the load balancing configuration is incorrect, it may result in some requests not being properly distributed to the backend servers.