App Export Error But Why?

Kodular is unable to compile this project.
The compiler error output was
________Preparing application icon
________Creating animation xml
________Creating fragment xml
________Creating listview xml in res/layout/…
________Creating listview xml in res/layout-v21/…
________Creating xml in res/drawable/…
________Creating splash png in res/drawable/…
________Creating colors xml
________Creating styles xml
________Creating drawables xml v21
________Checking for firebase
________Creating provider_path xml
________Creating network_security_config xml
________Generating adaptive icon file
________Generating round adaptive icon file
________Generating adaptive icon background file
________Generating manifest file
.

Go to project settings - see if theme is set. If not set it otherwise change it and set it again. Reload project, try to compile again.
If this doesn’t work maybe it is a project within a project case