Error message

• An unexpected error occurred while communicating with Chargebee.
• Warning: foreach() argument must be of type array|object, null given in Drupal\ael_chargebee\Plugin\Block\PlanSelector->build() (line 42 of modules/custom/ael_chargebee/src/Plugin/Block/PlanSelector.php).

  Drupal\ael_chargebee\Plugin\Block\PlanSelector->build() (Line: 171)
  Drupal\block\BlockViewBuilder::preRender()
  call_user_func_array() (Line: 113)
  Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 886)
  Drupal\Core\Render\Renderer->doCallback() (Line: 431)
  Drupal\Core\Render\Renderer->doRender() (Line: 503)
  Drupal\Core\Render\Renderer->doRender() (Line: 248)
  Drupal\Core\Render\Renderer->render() (Line: 484)
  Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 160)
  __TwigTemplate_04d1b1f352856d302898e080ff9ef443->doDisplay() (Line: 402)
  Twig\Template->yield() (Line: 358)
  Twig\Template->display() (Line: 373)
  Twig\Template->render() (Line: 51)
  Twig\TemplateWrapper->render() (Line: 33)
  twig_render_template() (Line: 348)
  Drupal\Core\Theme\ThemeManager->render() (Line: 490)
  Drupal\Core\Render\Renderer->doRender() (Line: 248)
  Drupal\Core\Render\Renderer->render() (Line: 484)
  Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 106)
  __TwigTemplate_0fb3b190269ad3d18371861a2944759d->doDisplay() (Line: 402)
  Twig\Template->yield() (Line: 358)
  Twig\Template->display() (Line: 373)
  Twig\Template->render() (Line: 51)
  Twig\TemplateWrapper->render() (Line: 33)
  twig_render_template() (Line: 348)
  Drupal\Core\Theme\ThemeManager->render() (Line: 490)
  Drupal\Core\Render\Renderer->doRender() (Line: 248)
  Drupal\Core\Render\Renderer->render() (Line: 158)
  Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 637)
  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: 53)
  Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
  Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
  Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 201)
  Drupal\page_cache\StackMiddleware\PageCache->fetch() (Line: 138)
  Drupal\page_cache\StackMiddleware\PageCache->lookup() (Line: 87)
  Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 50)
  Drupal\ban\BanMiddleware->handle() (Line: 48)
  Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
  Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36)
  Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
  Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 741)
  Drupal\Core\DrupalKernel->handle() (Line: 19)