Can't see project folders in IntelliJ IDEA

Solution 1:

If you look in project settings (ctrl-shift-alt-s), you should see a module structure. If you instead see "Nothing to see", do the following:

1. In Project Structure -> Modules, press the + button,
2. press enter (since, for some weird reason, it won't let me click on "New Module")
3. In the window that pops up, click on the "..." next to Content root, find your root folder, and select it
4. Press ok
5. ignore any warning that says the name is already in use (or to that effect)

Solution 2:

the simplest solution worked from me, just delete the .idea folder

keep in mind this will delete all of idea's current project configuration, it'll create the folder with default settings when reload the project again... but all other configuration will be lost if not properly backed-up