[solved] Nginx 413 Request Entity Too Large - Laravel

It seems that the error is not from PHP this is Nginx error I suggest that you can update the client_max_body_size from the configuration file by the next steps 

1. use SSH connection to connect to your server
2. go to /etc/nginx/sites-available using this command
   cd /etc/nginx/sites-available
3. see which config file is using probably it will be named with the domain name you are using
4. consider it's called “default” so you can run this command to edit it 
   sudo nano default (sudo nano domain_name)
5. then between the server { … } add client_max_body_size 64M;

Like

server {
	.....
	client_max_body_size 64M;
}

that's all, good luck