Hi Batu, iam not a professional but i made some apps so … i can only say what i would try
First of all, it seems to have nothing to do with your Oneplus!
Has your project CPP Code oder is it Blueprint only?
- Make a back up of your whole project and save it anywhere where you find it again
- Then try do delete the folders i marked on the screenshot
- Do not delete your “Build” Folder, when you wanna do this, backup your .keystore file (if you generate one)
Its possible that you lose your android project settings - this is no problem, just insert your data, Target SDK and Version Number of Android again
Now start your project again and it will regenerate these folders again!
If you have luck, that’s all you have to do