Garbled Symbols in IntelliJ plugin console

I’ve been trying to setup the elixir plugin for webstorm and using the run/debug returns some garbled symbols in the console , any ideas/ help?

IntelliJ terminal do not recognises the ANSI escape codes for colours and shows them instead. I do not know how to disable colours in IEx shell, but I would create an issue in IntelliJ as it is simple feature that IMHO such tool should support.

Note that this issue only occurs in the run configuration console, also theres a bunch of output before iex launches if that might help resolve the issue

That -elixir ansi_enabled true flag seems to be a problem as your terminal seems to not understand ANSI escape codes. I am not using IntelliJ so I cannot help you with this more.