Failed to login with Coherence

I Install coherence to manage users, when the user login and password I get the following error

[Error] #PID <0.411.0> running Mymodule.Endpoint terminated
Server: localhost: 4000 (http)
Request: POST / sessions
** (Exit) exited in: GenServer.call (Coherence.CredentialStore.Agent, {: update, #function <2.5628747 / 1 in Coherence.CredentialStore.Agent.put_credentials / 2>}, 5000)
** (EXIT) no process

Not really sure what coherence is (some context might be useful). However in general when you see stuff like “no process” the first thing to check is to make sure that :coherence and all other runtime dependencies that you have are added to your applications list in mix.exs

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