SSL cert -> empty response

Hello guys!

I just cannot seem to figure out why this is not working. I’m getting an empty response error (ERR_EMPTY_RESPONSE) on all requests.

The certificate is a wildcard (*.example.com) cert (letsencrypt) and is verified.

I am running one machine with:
Nextcloud on ports 81 (http) and 444 (https)
Node + express webserver on 5000 (http) and 5001 (https)
Strapi running on port 5003 (http, but needs to be ssl secured as well).

Have tried a lot of stuff, like changing mode from tcp to http, selecting different backends, regenerating the certificates. Any help would be much appreciated!

Config is as follows:

frontend https
        bind *:443 ssl crt /etc/ssl/example.com/example.com.pem
        mode tcp

        tcp-request inspect-delay 5s
        tcp-request content accept if { req_ssl_hello_type 1 }

        acl host_nextcloud req_ssl_sni -i files.example.com
        use_backend nextcloud-https if host_nextcloud

        acl host_webserver req_ssl_sni -i webserver.example.com
        use_backend webserver-https if host_webserver

        acl host_strapi req_ssl_sni -i strapi.example.com
        use_backend strapi-https if host_strapi

backend webserver-https
        mode tcp
        server webserver 127.0.0.1:5001 check

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