Failing to start elixir project in yaws webserver

Morning guys ,
I am deploying elixir project in yaws web server but some gen server services are failing to start

=SUPERVISOR REPORT==== 22-Jan-2020::08:26:15.461686 ===
    supervisor: {local,'Elixir.Welfare.UNIV_KIU'}
    errorContext: start_error
    reason: {noproc,
                {'Elixir.GenServer',call,
                    ['Elixir.DBConnection.Watcher',
                     {watch,'Elixir.DBConnection.ConnectionPool.Supervisor',
                         {'Elixir.DBConnection.ConnectionPool.Pool',
                             {<0.102.0>,#Ref<0.443755778.1682046977.29088>,
                              'Elixir.Postgrex.Protocol',
                              [{types,'Elixir.Postgrex.DefaultTypes'},
                               {hostname,<<"localhost">>},
                               {username,<<"root">>},
                               {port,5432},
                               {repo,'Elixir.Welfare.UNIV_KIU'},
                               {telemetry_prefix,[welfare,univ_kiu]},
                               {otp_app,welfare},
                               {timeout,15000},
                               {pool_size,10},
                               {pool,'Elixir.DBConnection.ConnectionPool'}]}}},
                     infinity]}}
    offender: [{pid,undefined},

Are you including the Elixir specific BEAM’s (not just your project, but elixir’s too) on the codepath?