Exceeding appcompat-v7

[Cingen]

This library is amazing but I couldn't exceed appcompat-v7 issue. I could used it accidently once but later it crashed whatever I did.
So, is there any way to use it without appcompat-v7 ? My project has "androidx.appcompat:appcompat:1.2.0" now.

Thanks.

Edit:
I deleted one line in build.gradle and the problem solved :)

android {
    compileSdkVersion 28
    buildToolsVersion "30.0.3" // this line.