[Thijs Eilander]

You need to load mod_ssl_ct before mod_http_ssl_ct

Something like this:

root@b8ab3399ba7b:/etc/nginx/modules-enabled# ls *ssl*
10-mod-ssl-ct.conf 50-mod-http-ssl-ct.conf

root@b8ab3399ba7b:/etc/nginx/modules-enabled# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful