Fresh installation Error

Hallo, I got an error installing Benz as Fresh installation. I followed the instruction like I've done for the other themes: - copied Demo folder into my server - created the db on mysqlserver and executed database.sql - configured apache

The error when launching the site is:

" The website encountered an unexpected error. Please try again later. Error: Class 'Phar' not found in Drupal\dexp_twitter\Access\TwitterOAuth->request() (line 336 of modules/drupalexp/modules/dexp_twitter/src/Access/TwitterOAuth.php). Drupal\dexp_twitter\Access\TwitterOAuth->request('https://api.twitter.com/1.1/statuses/user_timeline.json', 'GET', 'Authorization: OAuth oauth_version="1.0", oauth_nonce="53d2570cccada933045c2d57ba645e70", oauth_timestamp="1531920211", oauth_consumer_key="pgJN3MHj2kK5aK3aYhGe37GK1", oauth_token="806767560301518852-kncU475a0dAzQt0BX5LLIDXsFpW0lue", oauth_signature_method="HMAC-SHA1", oauth_signature="O8RVnhsj6Yni9acbkScnwx%2FZxy0%3D"', Array) (Line: 306) Drupal\dexp_twitter\Access\TwitterOAuth->oAuthRequest('https://api.twitter.com/1.1/statuses/user_timeline.json', 'GET', Array) (Line: 278) Drupal\dexp_twitter\Access\TwitterOAuth->http('GET', 'https://api.twitter.com', 'statuses/user_timeline', Array) (Line: 159) Drupal\dexp_twitter\Access\TwitterOAuth->get('statuses/user_timeline', Array) (Line: 115) Drupal\dexp_twitter\Plugin\Block\DexpTwitterBlock->build() (Line: 203) Drupal\block\BlockViewBuilder::preRender(Array) call_user_func('Drupal\block\BlockViewBuilder::preRender', Array) (Line: 378) Drupal\Core\Render\Renderer->doRender(Array) (Line: 450) Drupal\Core\Render\Renderer->doRender(Array) (Line: 450) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 195) Drupal\Core\Render\Renderer->render(Array) (Line: 490) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 56) TwigTemplate_b97b2aa84507c7b25a43bbc9127a13e8fdc7a6d598235846e7211f822b6a88c1->doDisplay(Array, Array) (Line: 432) Twig_Template->displayWithErrorHandling(Array, Array) (Line: 403) Twig_Template->display(Array) (Line: 411) Twig_Template->render(Array) (Line: 64) twig_render_template('themes/drupalexp/templates/section.html.twig', Array) (Line: 384) Drupal\Core\Theme\ThemeManager->render('section', Array) (Line: 437) Drupal\Core\Render\Renderer->doRender(Array) (Line: 450) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 195) Drupal\Core\Render\Renderer->render(Array) (Line: 490) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 48) TwigTemplate_81749a9a6649e592d8697b94b3d1fd3ef04af8d269c5039f8ed1716aa9728c18->doDisplay(Array, Array) (Line: 432) Twig_Template->displayWithErrorHandling(Array, Array) (Line: 403) Twig_Template->display(Array) (Line: 411) Twig_Template->render(Array) (Line: 64) twig_render_template('themes/drupalexp/templates/page.html.twig', Array) (Line: 384) Drupal\Core\Theme\ThemeManager->render('page', Array) (Line: 437) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 195) Drupal\Core\Render\Renderer->render(Array) (Line: 490) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 112) TwigTemplate_b232bb3aaf528967e774889e4b232b015bed7244fe6d6931f67f4aa7e64165de->doDisplay(Array, Array) (Line: 432) Twig_Template->displayWithErrorHandling(Array, Array) (Line: 403) Twig_Template->display(Array) (Line: 411) Twig_Template->render(Array) (Line: 64) twig_render_template('themes/drupalexp/templates/html.html.twig', Array) (Line: 384) Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 437) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 195) Drupal\Core\Render\Renderer->render(Array) (Line: 147) Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent{closure}() (Line: 582) 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: 184) Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 121) Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 75) Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47) Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50) Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23) Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 664) Drupal\Core\DrupalKernel->handle(Object) (Line: 19) "

How can I resolve this? Thanks!