i have some issue while runing the phoenix server about elixometer HOT 2 CLOSED

$ mix deps.tree
elixometer
├── exometer_core ~> 1.5 (Hex package)
│   ├── folsom 0.8.7 (Hex package)
│   │   └── bear 0.8.7 (Hex package)
│   ├── hut 1.2.1 (Hex package)
│   ├── parse_trans 3.3.0 (Hex package)
│   └── setup 2.0.2 (Hex package)
├── dialyxir ~> 1.0 (Hex package)
│   └── erlex >= 0.2.6 (Hex package)
├── pobox ~> 1.2 (Hex package)
├── excoveralls ~> 0.12 (Hex package)
│   ├── hackney ~> 1.16 (Hex package)
│   │   ├── certifi 2.5.2 (Hex package)
│   │   │   └── parse_trans ~>3.3 (Hex package)
│   │   ├── idna 6.0.1 (Hex package)
│   │   │   └── unicode_util_compat 0.5.0 (Hex package)
│   │   ├── metrics 1.0.1 (Hex package)
│   │   ├── mimerl ~>1.1 (Hex package)
│   │   ├── parse_trans 3.3.0 (Hex package)
│   │   └── ssl_verify_fun 1.1.6 (Hex package)
│   └── jason ~> 1.0 (Hex package)
├── credo ~> 1.1 (Hex package)
│   ├── bunt ~> 0.2.0 (Hex package)
│   └── jason ~> 1.0 (Hex package)
├── ex_doc ~> 0.20 (Hex package)
│   ├── earmark ~> 1.4.0 (Hex package)
│   └── makeup_elixir ~> 0.14 (Hex package)
│       └── makeup ~> 1.0 (Hex package)
│           └── nimble_parsec ~> 0.5.0 (Hex package)
└── lager >= 3.2.1 (Hex package)
    └── goldrush 0.1.9 (Hex package)