The probability is a nginx configuration problem. If the request is sent incorrectly, an SSL exception will be reported. The following is my configuration. The problem has been solved. If the certificate cannot be loaded, try to write the certificate path to the root directory.

ssl on;
        ssl_certificate         ssl/_.fetiononline.com.crt;
        ssl_certificate_key     ssl/_.fetiononline.com.key;
            
        ssl_session_timeout 5m;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_ciphers HIGH:!aNULL:!MD5;
        ssl_prefer_server_ciphers on;