Discourse upload doesn’t work

Uploading a file smaller than the Discourse instance’s “Max attachment size” might still fail if nginx is not configured correctly, which might be the case if you manage nginx manually. ¹

By default, client_max_body_size is 1 MB. You’ll want to update this value in the nginx config to whatever the max attachment size is: ¹

 server {
     root /var/www/html;
 
     index index.html index.htm index.nginx-debian.html;
     server_name forum.tsuki.games;
+    client_max_body_size 10M;

Then reload nginx: ¹

service nginx reload

Footnotes

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