Had the same issue, and @PhilippSalvisberg helped me fix it and explained the issue in more detail here. "Important: 127.0.0.1 cannot work, because we need the to communicate from the OracleDB in the docker container to the client running the debugger in VS Code. So the OracleDB needs the IP address of the client."

Instead, I ran ipconfig getifaddr en0 and used that address to connect with the debugger. Make sure the ACL is set up for that. Philipp uses a wildcard in the linked Gist.