Error message

Notice: Undefined variable: carModels1 in Drupal\new_vehicle\Step\StepOne->buildStepFormElements() (line 91 of modules/new_vehicle/src/Step/StepOne.php).
Drupal\new_vehicle\Step\StepOne->buildStepFormElements() (Line: 80)
Drupal\new_vehicle\Form\NewvehicleForm->buildForm(Array, Object)
call_user_func_array(Array, Array) (Line: 520)
Drupal\Core\Form\FormBuilder->retrieveForm('vehicle', Object) (Line: 277)
Drupal\Core\Form\FormBuilder->buildForm('\Drupal\new_vehicle\Form\NewvehicleForm', Object) (Line: 218)
Drupal\Core\Form\FormBuilder->getForm('\Drupal\new_vehicle\Form\NewvehicleForm') (Line: 27)
Drupal\new_vehicle\Plugin\Block\NewvehicleBlock->build() (Line: 470)
Drupal\twig_tweak\TwigExtension->drupalBlock('newcar_block') (Line: 74)
__TwigTemplate_f1ff5730598df40f5c95712780d251975631d6be5e845923c5f2960a88f3627d->doDisplay(Array, Array) (Line: 455)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 422)
Twig\Template->display(Array) (Line: 434)
Twig\Template->render(Array) (Line: 64)
twig_render_template('themes/custom/tvs/templates/views/views-view-unformatted--tvs_banner--block_3.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('views_view_unformatted__tvs_banner__block_3', Array) (Line: 431)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 444)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 200)
Drupal\Core\Render\Renderer->render(Array) (Line: 501)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 126)
__TwigTemplate_188ee3895a42aa6f9093ff10d8d37c2994904a1d09f59e461dacefe3b5d9071b->doDisplay(Array, Array) (Line: 455)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 422)
Twig\Template->display(Array) (Line: 434)
Twig\Template->render(Array) (Line: 64)
twig_render_template('themes/custom/tvs/templates/views/view-default/views-view.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('views_view', Array) (Line: 431)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 444)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 200)
Drupal\Core\Render\Renderer->render(Array) (Line: 501)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 95)
__TwigTemplate_236be3f8f0ae54e79f4e2787bc5c2f16fbd51179ee1c4863fd105b192c50f2d3->block_content(Array, Array) (Line: 216)
Twig\Template->displayBlock('content', Array, Array) (Line: 84)
__TwigTemplate_236be3f8f0ae54e79f4e2787bc5c2f16fbd51179ee1c4863fd105b192c50f2d3->doDisplay(Array, Array) (Line: 455)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 422)
Twig\Template->display(Array) (Line: 434)
Twig\Template->render(Array) (Line: 64)
twig_render_template('themes/custom/tvs/templates/block/block-default/block.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('block', Array) (Line: 431)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 444)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 200)
Drupal\Core\Render\Renderer->render(Array) (Line: 501)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 99)
__TwigTemplate_20c3441095fdbf90cfeba8e9959d9747f9f0396a30808311c0674dd5bc4c5787->doDisplay(Array, Array) (Line: 455)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 422)
Twig\Template->display(Array) (Line: 434)
Twig\Template->render(Array) (Line: 64)
twig_render_template('themes/custom/tvs/templates/page/page.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('page', Array) (Line: 431)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 200)
Drupal\Core\Render\Renderer->render(Array) (Line: 501)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 103)
__TwigTemplate_361ed5c91bd1a2a2b5aac1ebeb8f170b436c0c48fb282e965c84c38afda937d6->doDisplay(Array, Array) (Line: 455)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 422)
Twig\Template->display(Array) (Line: 434)
Twig\Template->render(Array) (Line: 64)
twig_render_template('themes/custom/tvs/templates/page/html.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 431)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 200)
Drupal\Core\Render\Renderer->render(Array) (Line: 147)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 573)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 148)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.view', Object) (Line: 156)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)