This problem related with your NGINX server.
Your server does not support Too Large Request URI
Try add or change (if exists this parametr) here: /etc/nginx/nginx.conf on the: large_client_header_buffers 4 32k;
fastcgi_buffers 16 32k;
fastcgi_buffer_size 32k;
proxy_buffer_size 128k;
proxy_buffers 4 256k;
proxy_busy_buffers_size 256k;
SPM
Buy on 
