Can't really figure out the issue here.
Logs:
State changed from crashed to starting
2021-09-06T01:31:47.912056+00:00 heroku[web.1]: Starting process with command `mix phx.server`
2021-09-06T01:31:51.650247+00:00 app[web.1]: 01:31:51.620 pid=<0.369.0> [error] GenServer BorsNG.GitHub terminating
2021-09-06T01:31:51.650272+00:00 app[web.1]: ** (ArgumentError) can't fetch value for key `BorsNG.GitHub.Server` of application `:bors`, expected `Elixir.Base.decode64/1` to return either `{:ok, value}` or `{:error, reason}` tuple, got: `:error`
2021-09-06T01:31:51.650273+00:00 app[web.1]: (confex 3.5.0) lib/confex.ex:155: Confex.fetch_env!/2
2021-09-06T01:31:51.650273+00:00 app[web.1]: (bors 0.1.0) lib/github/github/server.ex:864: BorsNG.GitHub.Server.get_jwt_token/0
2021-09-06T01:31:51.650274+00:00 app[web.1]: (bors 0.1.0) lib/github/github/server.ex:63: BorsNG.GitHub.Server.handle_call/3
2021-09-06T01:31:51.650274+00:00 app[web.1]: (stdlib 3.15) gen_server.erl:721: :gen_server.try_handle_call/4
2021-09-06T01:31:51.650274+00:00 app[web.1]: (stdlib 3.15) gen_server.erl:750: :gen_server.handle_msg/6
2021-09-06T01:31:51.650275+00:00 app[web.1]: (stdlib 3.15) proc_lib.erl:226: :proc_lib.init_p_do_apply/3
2021-09-06T01:31:51.650275+00:00 app[web.1]: Last message (from BorsNG.Supervisor): :get_app
2021-09-06T01:31:51.655764+00:00 app[web.1]: 01:31:51.650 pid=<0.44.0> [info] Application bors exited: BorsNG.Application.start(:normal, []) returned an error: shutdown: failed to start child: BorsNG.Attrs
2021-09-06T01:31:51.655765+00:00 app[web.1]: ** (EXIT) exited in: GenServer.call(BorsNG.GitHub, :get_app, 10000)
2021-09-06T01:31:51.655766+00:00 app[web.1]: ** (EXIT) an exception was raised:
2021-09-06T01:31:51.655767+00:00 app[web.1]: ** (ArgumentError) can't fetch value for key `BorsNG.GitHub.Server` of application `:bors`, expected `Elixir.Base.decode64/1` to return either `{:ok, value}` or `{:error, reason}` tuple, got: `:error`
2021-09-06T01:31:51.655767+00:00 app[web.1]: (confex 3.5.0) lib/confex.ex:155: Confex.fetch_env!/2
2021-09-06T01:31:51.655768+00:00 app[web.1]: (bors 0.1.0) lib/github/github/server.ex:864: BorsNG.GitHub.Server.get_jwt_token/0
2021-09-06T01:31:51.655768+00:00 app[web.1]: (bors 0.1.0) lib/github/github/server.ex:63: BorsNG.GitHub.Server.handle_call/3
2021-09-06T01:31:51.655768+00:00 app[web.1]: (stdlib 3.15) gen_server.erl:721: :gen_server.try_handle_call/4
2021-09-06T01:31:51.655769+00:00 app[web.1]: (stdlib 3.15) gen_server.erl:750: :gen_server.handle_msg/6
2021-09-06T01:31:51.655769+00:00 app[web.1]: (stdlib 3.15) proc_lib.erl:226: :proc_lib.init_p_do_apply/3
2021-09-06T01:31:53.183131+00:00 app[web.1]: {"Kernel pid terminated",application_controller,"{application_start_failure,bors,{{shutdown,{failed_to_start_child,'Elixir.BorsNG.Attrs',{'EXIT',{{#{'__exception__' => true,'__struct__' => 'Elixir.ArgumentError',message => <<\"can't fetch value for key `BorsNG.GitHub.Server` of application `:bors`, expected `Elixir.Base.decode64/1` to return either `{:ok, value}` or `{:error, reason}` tuple, got: `:error`\">>},[{'Elixir.Confex','fetch_env!',2,[{file,\"lib/confex.ex\"},{line,155}]},{'Elixir.BorsNG.GitHub.Server',get_jwt_token,0,[{file,\"lib/github/github/server.ex\"},{line,864}]},{'Elixir.BorsNG.GitHub.Server',handle_call,3,[{file,\"lib/github/github/server.ex\"},{line,63}]},{gen_server,try_handle_call,4,[{file,\"gen_server.erl\"},{line,721}]},{gen_server,handle_msg,6,[{file,\"gen_server.erl\"},{line,750}]},{proc_lib,init_p_do_apply,3,[{file,\"proc_lib.erl\"},{line,226}]}]},{'Elixir.GenServer',call,['Elixir.BorsNG.GitHub',get_app,10000]}}}}},{'Elixir.BorsNG.Application',start,[normal,[]]}}}"}
2021-09-06T01:31:53.183603+00:00 app[web.1]: Kernel pid terminated (application_controller) ({application_start_failure,bors,{{shutdown,{failed_to_start_child,'Elixir.BorsNG.Attrs',{'EXIT',{{#{'__exception__' => true,'__struct__' => 'Elixir.Argu
2021-09-06T01:31:53.183848+00:00 app[web.1]:
2021-09-06T01:31:53.311011+00:00 app[web.1]: Crash dump is being written to: erl_crash.dump...done
2021-09-06T01:31:53.356867+00:00 heroku[web.1]: Process exited with status 1
2021-09-06T01:31:53.503679+00:00 heroku[web.1]: State changed from starting to crashed
2021-09-06T01:32:10.571521+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=POST path="/webhook/github" host=borsts.herokuapp.com request_id=470a35f2-bba2-46bc-ac08-9691fb71cc6e fwd="140.82.115.246" dyno= connect= service= status=503 bytes= protocol=https
Any help is appreciated.
Thanks