hoi, I'm trying to run prefect server start and I get the below error messages :

ERROR: Invalid interpolation format for "apollo" option in service "services": "${GRAPHQL_HOST_PORT:-4201}"
Exception caught; killing services (press ctrl-C to force)
ERROR: Invalid interpolation format for "apollo" option in service "services": "${GRAPHQL_HOST_PORT:-4201}"
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/prefect/cli/server.py", line 332, in start
    ["docker-compose", "pull"], cwd=compose_dir_path, env=env
  File "/usr/lib64/python3.6/subprocess.py", line 311, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['docker-compose', 'pull']' returned non-zero exit status 1.