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The compile_env/4 error usually occurs when you are trying to deploy Phoenix using Edeliver and there is an issue with one or more of your dependencies. This error indicates that Edeliver was unable to compile your project on the remote server because it could not find a required dependency.

To resolve this error, you should first check your mix.exs file and ensure that all the necessary dependencies are included and properly configured. You should also make sure that your local environment matches the remote server environment, including the versions of Elixir and Erlang you are using.

If you have recently updated any dependencies, you may need to clear the cache on the remote server before deploying. You can do this by running the following command:

mix edeliver clear_cache

If none of these steps resolve the issue, you should review the Edeliver documentation or reach out to the Phoenix community for further assistance.