Install Domain Content

We need a reproducible scenario from a fresh Drupal instance in order to help.

Did you install it in a dev enviroment?

Try to change the line or comment it only (the dependencie should be checked in the domain_content.info.yml) in web/modules/contrib/domain/domain_content/domain_content.install:

require_once __DIR__ . './../domain_access/src/DomainAccessManagerInterface.php';

to:

if (!\Drupal::moduleHandler()->moduleExists('domain_access')) {
return [];
}

It looks like the hook_requirements do not work with the install phase if Drupal is installing some of the module dependencies like domain_access.

Switched to the runtime phase to simply warn the user if some of the Domain Access's required fields are missing.

Merging this as is. Let's see how it goes.

Won't be too difficult to rollback and should only affect new installs.