Nginx default upload size
The default maximum file size for uploads in Nginx is 2 MB. Users will receive an error 413 – Request Entity Too Large Error and Solution
when uploading a file larger than this limit and you didn't think about setting it when configuring your server.
You can easily raise it with the client_max_body_size
directive, e.g.
server {
# ...
client_max_body_size 512M;
}