So I think the answer is shown in the error:
Call to undefined method InstallControllerHttpSystem::trans() in
PrestaShop/install-dev/theme/views/system.php:35
Everywhere in this file is a call: $this->translator->trans( - but on line 35: $this->trans and when I fix this, installation continues.
So I think the answer is shown in the error:
Call to undefined method InstallControllerHttpSystem::trans() in
PrestaShop/install-dev/theme/views/system.php:35
Everywhere in this file is a call: `$this->translator->trans('` - but on line 35: `$this->trans` and when I fix this, installation continues.