启用Certbot配置SSL后服务器HTTPS无法访问的排查求助

大家好，我遇到了一个SSL配置的问题，想请各位帮忙诊断解决：

我执行了命令sudo certbot --nginx给Nginx配置SSL证书，命令执行显示成功，但现在服务器只能通过HTTP正常访问，HTTPS完全打不开。我已经导出了/etc/nginx/sites-available/default的配置文件内容，如下：

# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# https://www.nginx.com/resources/wiki/start/
# https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/
# https://wiki.debian.org/Nginx/DirectoryStructure
#
# In most cases, administrators will remove this file from sites-enabled/ and
# leave it as reference inside of sites-available where it will continue to be
# updated by the nginx packaging team.
#
# This file will automatically load configuration files provided by other
# applications, such as Drupal or Wordpress. These applications will be made
# available underneath a path with that package name, such as /drupal8.
#
# Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
##

# Default server configuration
#
server {

#listen 443;
#listen [::]:443;

# SSL configuration
#
# listen 443 ssl default_server;
# listen [::]:443 ssl default_server;
#
# Note: You should disable gzip for SSL traffic.
# See: https://bugs.debian.org/773332
#
# Read up on ssl_ciphers to ensure a secure configuration.
# See: https://bugs.debian.org/765782
#
# Self signed certs generated by the ssl-cert package
# Don't use them in a production server!
#
# include snippets/snakeoil.conf;

root /var/www/html/waste-management-dev/public;

# Add index.php to the list if you are using PHP
index index.php;

server_name yourdomain.in;

location / {
# First attempt to serve request as file, then
# as directory, then fall back to displaying a 404.
#try_files $uri $uri/ =404;
try_files $uri $uri/ /index.php?q=$uri&$args;
}

# pass PHP scripts to FastCGI server
#
location ~ \.php$ {
try_files $uri =404;
fastcgi_split_path_info ^(.+\.php)(/.+)$;
include fastcgi_params;
fastcgi_pass unix:/run/php/php7.4-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
#fastcgi_param SCRIPT_NAME $fastcgi_script_name;
#include fastcgi_params;
}

# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
#       deny all;
#}

listen [::]:443 ssl ipv6only=on; # managed by Certbot
listen 443 ssl; # managed by Certbot

ssl_certificate /etc/letsencrypt/live/yourserver.in/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/yourserver.in/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

# Virtual Host configuration for example.com
#
# You can move that to a different file under sites-available/ and symlink that
# to sites-enabled/ to enable it.
#
#server {
#       listen 80;
#       listen [::]:80;
#
#       server_name example.com;
#
#       root /var/www/example.com;
#       index index.html;
#
#       location / {
#               try_files $uri $uri/ =404;
#       }
#}

server {
if ($host = yourserver.in) {
return 301 https://$host$request_uri;
} # managed by Certbot

listen 80 default_server;
listen [::]:80 default_server;

server_name myserver;
return 404; # managed by Certbot
}

我想请教大家，我应该采取哪些步骤来排查这个问题？有没有什么常见的配置陷阱或者我可能漏掉的设置？

非常感谢任何帮助和指导！

备注：内容来源于stack exchange，提问作者Sri