I have faced an issue in a web server using Nginx while trying to upload a file using wordpress.

In the nginx error log I saw the error “Client intended to send too large body” in this entry:

$ tail -f /var/log/nginx/*error*.log
2020/09/01 14:31:04 [error] 884#884: *126565 client intended to send too large body: 1195619 bytes, client:, server: test.com, request: "POST /wp-json/wp/v2/media?_locale=user HTTP/2.0", host: "test.com", referrer: "https://test.com/wp-admin/post.php?post=2460&action=edit"

This limitation is defined in the Nginx web server, so I have to changed the configuration of the server:

$ sudo vi /etc/nginx/nginx.conf

Then you have to add or modify the next configuration in the http{} section.

client_max_body_size 250M;

Next step is to check the configuration of Nginx is OK:

$ nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

And finally, restart the server:

$ sudo systemctl reload nginx

It’s done. Now you shouldn’t see this error while uploading files under 250Mb.