Hello, like usually, I'm not sure if it's bug or am I doing it wrong, so I will post it here for now.

IntelliJ IDEA 2021.1.2 (Ultimate Edition) Build #IU-211.7442.40, built on June 1, 2021

Windows 10

0.7.7

And I got error "SDK not specified for module test5.

File output with anything or even list of errors.

Cannot start compiler The SDK is not specified for module test5"

A few days ago it worked. Or like 2-3 weeks ago. I messed a little with: Settings > Editor > File and Code Templates > LaTeX Source I changed code a little, but now it's back to original. I don't think I touched anything else.

Now I can't compile not only new projects, but old one I had working before have same problems too. (I open project, click "build" and have same problem).

In: Project structure > Project Settings > Modules I should be able to configure SDK for each module according to IntelliJ IDEA help site like this:

but all I see is this, without way to configure SDK:

SDK should be by itself configured for each module same as SDK for project. I also don't understand, why it's named "module". test5 is whole project from my perspective without any modules. I guess in theory it is the only module for itself... But somehow that feels wrong for me.