def METHOD_NAME():
    conn = boto3.client("managedblockchain", region_name="us-east-1")
    # Create network - need a good network
    network_id = conn.create_network(
        Name="testnetwork1",
        Framework="HYPERLEDGER_FABRIC",
        FrameworkVersion="1.2",
        FrameworkConfiguration=helpers.default_frameworkconfiguration,
        VotingPolicy=helpers.default_votingpolicy,
        MemberConfiguration=helpers.default_memberconfiguration,
    )["NetworkId"]
    with pytest.raises(ClientError) as ex:
        conn.create_proposal(
            NetworkId=network_id,
            MemberId="m-ABCDEFGHIJKLMNOP0123456789",
            Actions=helpers.default_policy_actions,
        )
    err = ex.value.response["Error"]
    assert err["Code"] == "ResourceNotFoundException"
    assert "Member m-ABCDEFGHIJKLMNOP0123456789 not found" in err["Message"]