After Updating Android studio to 3.1.2 , I get “Failed to load AppCompat ActionBar with unknown error. ”

Question

I tried looking other similar questions on stackoverflow, they advice us to changw version of \"buildToolsVersion\" but I dont see word like that in my gradle file.

Answer 1

I was helped by Hossein Seifi's reply but with a change

implementation 'com.android.support:design:28.0.0-alpha3'

to

implementation 'com.android.support:design:28.0.0-alpha1'

and click File -> Invalidate Caches / Restart