Problem with installing the 3-dev version on Drupal9.

[n1c0l492]

Problem with installing the 3-dev version on Drupal9.
The log gives this error:
`The website encountered an unexpected error. Please try again later.

Twig\Error\LoaderError: Template "@ecl-twig/skip-link" is not defined in "themes/contrib/oe_theme/templates/html/html.html.twig" at line 32. in Twig\Loader\ChainLoader->getCacheKey() (line 98 of /var/www/html/drupal/vendor/twig/twig/src/Loader/ChainLoader.php).
Twig\Environment->getTemplateClass() (Line: 205)
Drupal\Core\Template\TwigEnvironment->getTemplateClass() (Line: 381)
Twig\Environment->loadTemplate() (Line: 333)
Twig\Template->loadTemplate() (Line: 76)
__TwigTemplate_8d7e45cfaee96c7e04aa8498c7cdaa25->doDisplay() (Line: 405)
Twig\Template->displayWithErrorHandling() (Line: 378)
Twig\Template->display() (Line: 390)
Twig\Template->render() (Line: 55)
twig_render_template() (Line: 384)
Drupal\Core\Theme\ThemeManager->render() (Line: 422)
Drupal\Core\Render\Renderer->doRender() (Line: 201)
Drupal\Core\Render\Renderer->render() (Line: 162)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent{closure}() (Line: 564)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 163)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray()
call_user_func() (Line: 142)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 164)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 81)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 58)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 23)
Stack\StackedHttpKernel->handle() (Line: 709)
Drupal\Core\DrupalKernel->handle() (Line: 19)`

Following the instructions, i.e. enabling the theme-helper plugin is even worse because it also makes the admin theme unusable.

[sancjan]

Same problem here!
I'm using:
Drupal 9.4
Composer 2.4.4
PHP 8.1

I've configured my composer JSON with these dependencies because the only one supported by PHP 8
openeuropa/composer-artifacts:1.0.0-alpha1
openeuropa/oe_theme:3.0.0-beta18.

Following the documentation , I'm not possible install the oe_theme using composer (see attachment)

Alternatively, I installed manually the oe_theme (not using composer), and not working nether (I got the same error than the mate mentioned above)

Enabling oe_theme_helper crashes the installation too.

[kiwimind]

@sancjan I had this until someone pointed out to use dev-master: #1215 (comment)