Логи на сервере:
2021/04/10 15:00:52 [error] 34989#34989: *39417592 limiting requests, excess: 75.400 by zone "one", client: ip.ip.ip.ip, server: mydomen.ru, request: "GET /upload/000/u1/4d/97/0f9b157e.jpg HTTP/2.0", host: " mydomen.ru", referrer: "https:// mydomen.ru/"
2021/04/10 15:00:52 [error] 34989#34989: *39417592 limiting requests, excess: 75.400 by zone "one", client: ip.ip.ip.ip, server: mydomen.ru, request: "GET /upload/000/u1/8c/d3/19f77f5e.png HTTP/2.0", host: " mydomen.ru", referrer: "https:// mydomen.ru/"
2021/04/10 15:00:52 [error] 34989#34989: *39417592 limiting requests, excess: 75.400 by zone "one", client: ip.ip.ip.ip, server: mydomen.ru, request: "GET /templates/default/images/icons/folder.png HTTP/2.0", host: " mydomen.ru", referrer: "https:// mydomen.ru/templates/default/css/theme-widgets.css?1548678965"
2021/04/10 15:07:20 [warn] 34989#34989: *39417592 a client request body is buffered to a temporary file /tmp/nginx_body_temp/0000355317, client: ip.ip.ip.ip, server: mydomen.ru, request: "POST /images/upload/photo?sizes=normal,micro,small,big,original&qqfile=idAxg-SP_VM.jpg HTTP/2.0", host: " mydomen.ru", referrer: "https:// mydomen.ru/articles/add/25"
2021/04/10 15:07:49 [warn] 34989#34989: *39417592 a client request body is buffered to a temporary file /tmp/nginx_body_temp/0000355325, client: ip.ip.ip.ip, server: mydomen.ru, request: "POST /images/upload/photo?sizes=normal,micro,small,big,original&qqfile=soup.jpg HTTP/2.0", host: " mydomen.ru", referrer: "https:// mydomen.ru/articles/add/25"
Я бы посоветовал проверить настройки своего сервера
По ошибкам вот можно почитать тут