After update to Android Studio 4.0.1, my total Android Studio stop working! The display cannot resolve symbol ‘AppCompatActivity’

[![enter image description here](https://i.stack.imgur.com/xa8t9.png)](https://i.stack.imgur.com/xa8t9.png)

[![enter image description here](https://i.stack.imgur.com/nnv4o.png)](https://i.stack.imgur.com/nnv4o.png)

and when click on AppCompatActivity display

When I click on Setup JDK open Select Project SDK Select any Android API and click the OK button nothing happens. If I click on the Configure button Configure SDK cannot be changed here.
[![enter image description here](https://i.stack.imgur.com/adkCt.png)](https://i.stack.imgur.com/adkCt.png)

If I want to open SDK Manager from Tools menu nothing opens. Also, the Settings option can’t be opened from the File menu.
But my previous version Android Studio works properly. But after I've updated all of my projects, the same problem persists. What can I do now? Please help me?