guam from winterfell and erlang-lager logging

[hede]

Hi.

I'm testing guam from winterfell on debian 9. Seems it's not ready right now. Any hints on how to repair it? Erlang is a closed book to me...

regards
hede

root at kolabtest:~# /usr/sbin/guam foreground
Exec: /usr/lib/erlang/erts-8.2.1/bin/erlexec -noshell -noinput +Bd -boot /usr/lib/erlang/lib/guam-0.9.0/releases/0.9.0/guam -mode embedded -config /usr/lib/erlang/lib/guam-0.9.0/releases/0.9.0/sys.config -boot_var ERTS_LIB_DIR /usr/lib/erlang/erts-8.2.1/../lib -args_file /usr/lib/erlang/lib/guam-0.9.0/releases/0.9.0/vm.args -- foreground
Root: /usr/lib/erlang/lib/guam-0.9.0

=INFO REPORT==== 3-Nov-2017::20:55:31 ===
    application: kolab_guam
    exited: {bad_return,
                {{kolab_guam,start,[normal,[]]},
                 {'EXIT',
                     {undef,
                         [{lager_config,get,
                              [{lager_event,loglevel},{0,[]}],
                              []},
                          {kolab_guam,start,2,
                              [{file,
                                   "/build/guam-0.9.0/_build/default/lib/kolab_guam/src/kolab_guam.erl"},
                               {line,33}]},
                          {application_master,start_it_old,4,
                              [{file,"application_master.erl"},
                               {line,273}]}]}}}}
    type: permanent
{"Kernel pid terminated",application_controller,"{application_start_failure,kolab_guam,{bad_return,{{kolab_guam,start,[normal,[]]},{'EXIT',{undef,[{lager_config,get,[{lager_event,loglevel},{0,[]}],[]},{kolab_guam,start,2,[{file,\"/build/guam-0.9.0/_build/default/lib/kolab_guam/src/kolab_guam.erl\"},{line,33}]},{application_master,start_it_old,4,[{file,\"application_master.erl\"},{line,273}]}]}}}}}"}
Kernel pid terminated (application_controller) ({application_start_failure,kolab_guam,{bad_return,{{kolab_guam,start,[normal,[]]},{'EXIT',{undef,[{lager_config,get,[{lager_event,loglevel},{0,[]}],[]},

Crash dump is being written to: erl_crash.dump...done