SSL set up gives "redirected you too many times."

Hi,

I am trying to set up SSL with this tutorial - https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-16-04#step-1-install-let’s-encrypt-client

Everything went okay but when I try to go to my subdomain (only this should be encrypted), I am getting following:

The work-bot.be-codified.com page isn’t working

work-bot.be-codified.com redirected you too many times.

Here is my /etc/nginx/sites-available/default file

server {
        listen 80 default_server;
        listen [::]:80 default_server;
        server_name work-bot.be-codified.com;
        return 301 https://$server_name$request_uri;

        # SSL configuration
        #
        listen 443 ssl http2 default_server;
        listen [::]:443 ssl http2 default_server;
        include snippets/ssl-work-bot.be-codified.com.conf;
        include snippets/ssl-params.conf;

Can somebody please tell me what is wrong?