The following section applies to anyone using PLESK or who want to use the SSO.
- Login into PLESK
- Select Apache & Nginx Settings
- Scroll all the way to the bottom and look for: Additional nginx directives
- Copy and Paste this into the block: fastcgi_buffers 16 16k; fastcgi_buffer_size 32k; proxy_buffer_size 128k; proxy_buffers 4 256k; proxy_busy_buffers_size 256k;