Atom-ide-ui not showing any errors in code (C#)

Hi, I’m completely new to Atom and I’m generally a noob and an idiot so please explain things like I didn’t know anything beforehand (explain like I’m five).
I want to use Atom to write C# scripts for Unity. I installed Atom and looked through some of the most popular community packages and installed the ones I thought could be useful for me. The community packages I have installed and enabled are:
atom-beautify
atom-ide-ui
autocomplete-unity
busy-signal
highlight-selected
ide-csharp
intentions
minimap
open-recent
unity-shader-files

I started to write my scripts, but seems like Atom doesn’t recognize any errors I make. Diagnostics have no messages, Console has no relevant messages and Outline view is empty and says: “No outline available. This is likely an error with the language package.”

I have no idea what to do. Am I missing something? Can anybody help?

I don’t have any knowledge of ide-csharp, but there’s an issue thread about people having similar problems here.