@joyceflorenc3

I am using Drupal 10.2.3 and PHP 8.1.27. I tried with PHP 8.2 and 8.3 but had the same result.

Just wanted to clarify that I am currently seeing the error only in the website's admin backend. The frontend of the website is accessible.

Thanks a lot. Unfortunately, my website is still inaccessible, and now it shows a different error:

The website encountered an unexpected error. Please try again later.

Error: Cannot use object of type __PHP_Incomplete_Class as array in Drupal\Core\Render\RenderCache->get() (line 76 of core/lib/Drupal/Core/Render/RenderCache.php).
Drupal\Core\Render\PlaceholderingRenderCache->get() (Line: 282)
Drupal\Core\Render\Renderer->doRender() (Line: 458)
Drupal\Core\Render\Renderer->doRender() (Line: 204)
Drupal\Core\Render\Renderer->render() (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 99)
__TwigTemplate_08434a4b066b57b3dedb1ad0c753d0db->doDisplay() (Line: 394)
Twig\Template->displayWithErrorHandling() (Line: 367)
Twig\Template->display() (Line: 379)
Twig\Template->render() (Line: 40)
Twig\TemplateWrapper->render() (Line: 53)
twig_render_template() (Line: 372)
Drupal\Core\Theme\ThemeManager->render() (Line: 445)
Drupal\Core\Render\Renderer->doRender() (Line: 204)
Drupal\Core\Render\Renderer->render() (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 93)
__TwigTemplate_19a0e0ebd38dd69d0308a7cd58edc4bf->doDisplay() (Line: 394)
Twig\Template->displayWithErrorHandling() (Line: 367)
Twig\Template->display() (Line: 379)
Twig\Template->render() (Line: 40)
Twig\TemplateWrapper->render() (Line: 53)
twig_render_template() (Line: 372)
Drupal\Core\Theme\ThemeManager->render() (Line: 445)
Drupal\Core\Render\Renderer->doRender() (Line: 204)
Drupal\Core\Render\Renderer->render() (Line: 158)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 592)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 153)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray()
call_user_func() (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 58)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch() (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup() (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 704)
Drupal\Core\DrupalKernel->handle() (Line: 19)

I did use composer as you suggest, this was the command I used:

composer require 'drupal/nitropack:^1.1@alpha

joyceflorenc3 → created an issue.