Failed to load AppCompat ActionBar with unknown error in android studio 3.1.4

Question

I am getting this error in android studio

Render problem

Failed to load AppCompat ActionBar with unknown error.

Failed to instantia

Answer 1

com.android.support:appcompat-v7:28.0.0-alpha3 has few bugs

change

implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'

to

implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'

or In your styles xml-file change this: