Error in login

[AndroDevMili]

I have deployed the WSO2 IOT server on my machine using Docker.
When I tried to log in from compatible client version got following error

Enrollment failed, please contact administrator.
Code: 500

org.wso2.iot.agent D/DynamicClientManager: com.android.volley.NoConnectionError: java.io.IOException: unexpected end of stream on Connection{LOCAL_IP:9443, proxy=DIRECT hostAddress=LOCAL_IP cipherSuite=none protocol=http/1.1} (recycle count=0)

MacOs 10.14, Docker 18.06.1-ce-mac73
WSO IOT server version 3.2.0, Client version 3.1.31

How can I resolve this issue?
Please help.

[nogueras]

Same issue here, but instead of in a Docker container, in a LinuxMint guest VirtualBox.
Any ideas how to solve the issue?