Hosted ETCD server in AWS - Dashboard cannot connect

[FabianNet]

Hi all,
I have hosted etcd version 3.4 in AWS ECS and I can reach it via the address:

http://alb-xxx-1234567890.eu-central-1.elb.amazonaws.com:12379/version

response: {"etcdserver":"3.4.15","etcdcluster":"3.4.0"}

I also use this address in the conf.yaml of the Dashboard but then I get an error message:

{"level":"warn","ts":"2023-10-18T09:00:21.089Z","logger":"etcd-client","caller":"v3@v3.5.5/retry_interceptor.go:62","msg":"retrying of unary invoker failed","target":"etcd-endpoints://0xc0007aee00/alb-xxx-1234567890:2379","attempt":0,"error":"rpc error: code = Unavailable desc = error reading from server: EOF"}
"attempt":12,"error":"rpc error: code = DeadlineExceeded desc = context deadline exceeded"}
Error: etcd get failed: context deadline exceeded

Is there a way I can connect from the docker container of the dashboard to an external etcd address?