Errors Common in Phoenix

Error (EXIT) shutdown: failed to start child: Phoenix.PubSub.PG2

Solution

mix deps.clean --all
mix deps.get

Error undefined module: rename all to heex

<.form let={f} for={:upload} action={Routes.audio_path(@socket, :upload)} options={multipart={true}} >

Error (UndefinedFunctionError) function :crypto.hmac/3 is undefined or private

Solution mix deps.update --all