Cannot reach instance via HTTPS

Hi,

i'm experiencing a problem with the HTTPS setup

There is a EC2 instance in the "us-east-1c", which at the moment have nginx in Docker container and is responding to the requests via http :80 (no SSL setup in Nginx)

To be able to communicate via HTTPS i've set up a Load Balancer with the following details:

Load balancer type Application Scheme Internet-facing Availability Zones: subnet-0a5ea626d1b3eea1d us-east-1b (use1-az2) subnet-022fe15b2fc4b19dd us-east-1c (use1-az4)

The Load balancer is "active", as it can be seen in the Load Balancers console.

There is one listener: HTTPS:443 which is connected to the previously issued certificate in the certificate manager.

The listener is forwarding requests to the Target Group in the same VPC, zone us-east-1c. This only contains one instance (mentioned in the beginning of this message), and in the Target Groups console it's status is "healthy"

The Security Group for this Load Balancer contain inbound rules for 80 and 443 for both IPv4 and v6

Still, when i'm trying to connect to my instance via https, i.e.:

curl -I 'https://<domain-name>/'

i'm getting "curl: (7) Failed to connect to <domain-name> port 443 after 163 ms: Couldn't connect to server"

while access via HTTP works just fine, i.e.:

curl -I 'http://<domain-name>/'

responds with the following:

HTTP/1.1 200 OK
Server: nginx
Date: Tue, 26 Sep 2023 15:11:33 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 1159
Connection: keep-alive
X-Frame-Options: DENY
Vary: origin
X-Content-Type-Options: nosniff
Referrer-Policy: same-origin
Cross-Origin-Opener-Policy: same-origin

Please, can you help me - what am I doing wrong?

Thanks in advance!