Hey! Thanks for your help and time!

This "package" is based by https://github.com/nWidart/laravel-modules

My problem:

Inertiatest\Browser\Tests\Unit\BrowseTest::browse_shows_all_topics
InvalidArgumentException: View [app] not found.

This happens if you PHPunit test the test browse_shows_all_topics, found in src/Modules/Browser/Tests/Feature/BrowseTest.php

Solution?

Probably you need to add a dummy app.blade.php file and load it through a Provider or TestCase.php