Android, Gradle + Google Cardboard, Unity

Hi, I’m trying to building an android project according to this google forum to make VR projects for Androids: Quickstart for Google Cardboard for Unity  |  Google Developers
But trying building this string occurred: resourse’style/theme.appcombat.noactionbar’ not found in androidmanifest.xml:87
I’m not sure to have been did any mistake…of course I tried googling this, but no solution appeared to me.
I’m working on it from so much time and I really need the help of an expert, thanks for collaboration!