algorithm rsa not supported for create key

[Omwalid]

In order to get familiazed with the docker notary, I have deployed the notary using the docker-compose.
Since the certificate have been expired, I generated new certificates using the following commands :

openssl genrsa -out notary-server.key 2048
openssl req -new -key notary-server.key -out notary-server.csr  -subj "/C=FR/ST=CA/L=Paris/O=Docker/CN=notaryserver" -addext "subjectAltName = DNS:notaryserver"
openssl x509 -req -in notary-server.csr -CA root-ca.crt -CAkey w_ca.key -CAcreateserial -out notary-server.crt -days 365 -extfile <(printf "subjectAltName=DNS:notaryserver")


openssl genrsa -out notary-signer.key 2048
openssl req -new -key notary-signer.key -out notary-signer.csr -subj "/C=FR/ST=CA/L=Paris/O=Docker/CN=notarysigner" -addext "subjectAltName = DNS:notarysigner"
openssl x509 -req -in notary-signer.csr -CA root-ca.crt -CAkey w_ca.key -CAcreateserial -out notary-signer.crt -days 365 -extfile <(printf "subjectAltName=DNS:notarysigner")

After running the docker-compose, and once the containers are up and running. I ran :

export DOCKER_CONTENT_TRUST=1
export DOCKER_CONTENT_TRUST_SERVER=https://localhost:4443

docker trust key generate user-signer
docker trust signer add --key user-signer.pub user-signer localhost:5000/testwalidimage

I get this error :

unable to reach trust server at this time: 500.

Logs in notary_server :
{"go.version":"go1.17.13","http.request.host":"localhost:4443","http.request.id":"a8e602f3-aecf-4442-a4ab-7d27bc329bca","http.request.method":"GET","http.request.remoteaddr":"172.17.0.1:56662","http.request.uri":"/v2/localhost:5000/walidimage/_trust/tuf/timestamp.key","http.request.useragent":"Docker-Client/20.10.23 (linux)","level":"error","msg":"unknown: unknown error: rpc error: code = Unknown desc = algorithm rsa not supported for create key","time":"2023-04-28T08:32:09Z"}

I found the same problem in this issue : #1597
But I don't understand why I get this error ? when I use docker trust key generate, keys are generated and stored in .docker/trust/private, so why I get this error ? What key is the server trying to generate ? how to solve this problem ?