when i creat new android studio project ,i got errors notification,Faild to instantiate one or more classes

Question

errors 👇

notification,Faild to instantiate one or more classes

explain..

The following classes couldbnot be instantiated:

androidx.constraintlayout.widget.comstraintLayout(open class,show Exception,Clear cache)

2: error
in xml 👇

tool:context=".MainActivity">

notification👇

unresolved class MainActivity