"Test was run in child process and ended unexpectedly" on all functional tests.

[guiu-rocafort]

I set a basic environment with the recommended commands in the readme

ddev start
ddev composer install
ddev auth ssh
ddev install

I run the tests using the provided command "ddev test ". All the Functional tests fail with the error "Test was run in child process and ended unexpectedly", this is consistent between different modules, i tried "examples", and "domain" for example. The Kernel tests work fine.

This is an sample output from "ddev test examples":

 ✘ Add fields
   ┐
   ├ Test was run in child process and ended unexpectedly
   │
   ╵ /var/www/html/vendor/phpunit/phpunit/src/Framework/TestSuite.php:684
   ╵ /var/www/html/vendor/phpunit/phpunit/src/Framework/TestSuite.php:684
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/TestRunner.php:651
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/Command.php:144
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/Command.php:97
   ┴

 ✘ Create admin permission
   ┐
   ├ Test was run in child process and ended unexpectedly
   │
   ╵ /var/www/html/vendor/phpunit/phpunit/src/Framework/TestSuite.php:684
   ╵ /var/www/html/vendor/phpunit/phpunit/src/Framework/TestSuite.php:684
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/TestRunner.php:651
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/Command.php:144
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/Command.php:97
   ┴

Contact (Drupal\Tests\content_entity_example\Kernel\Contact)
 ✔ Entity

Cron Example (Drupal\Tests\cron_example\Functional\CronExample)
 ✘ Cron example basic
   ┐
   ├ Test was run in child process and ended unexpectedly
   │
   ╵ /var/www/html/vendor/phpunit/phpunit/src/Framework/TestSuite.php:684
   ╵ /var/www/html/vendor/phpunit/phpunit/src/Framework/TestSuite.php:684
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/TestRunner.php:651
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/Command.php:144
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/Command.php:97
   ╵ /var/www/html/vendor/bin/phpunit:122
   ┴

Dbtng Example (Drupal\Tests\dbtng_example\Functional\DbtngExample)
 ✘ Dbtng example
   ┐
   ├ Test was run in child process and ended unexpectedly
   │
   ╵ /var/www/html/vendor/phpunit/phpunit/src/Framework/TestSuite.php:684
   ╵ /var/www/html/vendor/phpunit/phpunit/src/Framework/TestSuite.php:684
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/TestRunner.php:651
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/Command.php:144
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/Command.php:97
   ╵ /var/www/html/vendor/bin/phpunit:122
   ┴

 ✘ Ui
   ┐
   ├ Test was run in child process and ended unexpectedly
   │
   ╵ /var/www/html/vendor/phpunit/phpunit/src/Framework/TestSuite.php:684
   ╵ /var/www/html/vendor/phpunit/phpunit/src/Framework/TestSuite.php:684
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/TestRunner.php:651
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/Command.php:144
   ╵ /var/www/html/vendor/phpunit/phpunit/src/TextUI/Command.php:97
   ╵ /var/www/html/vendor/bin/phpunit:122
   ┴

Dbtng Example Repository (Drupal\Tests\dbtng_example\Kernel\DbtngExampleRepository)
 ✔ Dbtng example storage