Android Studio inline compiler showing red errors, but compilation with gradle works fine

Question

I\'ve set up my project in Android Studio to use the Square Wire library, as per this question.

Build -> Compile Project works fine.

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Answer 1

In my case, for some reason, Android Plugin Version wasn't set. I did try clearing cache and removing .gradle and .idea as well, but it didn't work out and after finally wandering for hours, I found this.