Unity editor 2019.3.9f1 has error while launching

I installed unity editor 2019.3.9f1 and upgraded my project. Everyhing went smooth. Then i tried to switch platform to android and found out that i need to have SDK and NDK. So i wanted to add those in modules, but on three dots it didn't show add modules, so i redownloaded it. When trying to start my project it says error while launching. I thought maybe downgrading version, and then upgrading it back to 2019.3.9f1 would solve a problem, but the same error happened, how can i make it work? And the error says "Error launching the editor. The application path does not exist"