If your Laravel and Filament are being served by Nginx, there's a chance that you might run into an issue where the Filament assets are not loaded properly.

To overcome this issue, you need to tell Nginx that the /filament should be handled by Laravel index.php.

All you need is to add the following Nginx configuration into your Nginx virtual host:

location ^~ /filament {
    try_files $uri $uri/ /index.php?$query_string;
}

Full example:

server {
    listen 80;
    listen [::]:80;
    server_name example.com;
    root /srv/example.com/public;
 
    add_header X-Frame-Options "SAMEORIGIN";
    add_header X-Content-Type-Options "nosniff";
 
    index index.php;
 
    charset utf-8;
 
    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }
 
    location ^~ /filament {
       try_files $uri $uri/ /index.php?$query_string;
    }
 
    location = /favicon.ico { access_log off; log_not_found off; }
    location = /robots.txt  { access_log off; log_not_found off; }
 
    error_page 404 /index.php;
 
    location ~ \.php$ {
        fastcgi_pass unix:/var/run/php/php8.0-fpm.sock;
        fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
        include fastcgi_params;
    }
 
    location ~ /\.(?!well-known).* {
        deny all;
    }
}

If you're not sure where to edit your Nginx file, mostly it's on /etc/nginx/sites-enabled/your-website-name.com.

You can read more at: Nginx Configuration for Filament and How to fix Laravel Filament assets are not loaded properly