Lots of Errors

I get lots of these in the log:

Notice: Undefined property: Drupal\views\ViewExecutable::$base_table in views_php_form_element() (line 116 of C:\wamp64\www\PrevSol\sites\all\modules\contrib\views_php\views_php.module) #0 C:\wamp64\www\PrevSol\core\includes\bootstrap.inc(584): _drupal_error_handler_real(8, 'Undefined prope...', 'C:\\wamp64\\www\\P...', 116, Array) #1 C:\wamp64\www\PrevSol\sites\all\modules\contrib\views_php\views_php.module(116): _drupal_error_handler(8, 'Undefined prope...', 'C:\\wamp64\\www\\P...', 116, Array) #2 C:\wamp64\www\PrevSol\sites\all\modules\contrib\views_php\src\Plugin\views\field\ViewsPhp.php(67): views_php_form_element(Object(Drupal\views_php\Plugin\views\field\ViewsPhp), false, Array, Array) #3 C:\wamp64\www\PrevSol\core\modules\views_ui\src\Form\Ajax\ConfigHandler.php(167): Drupal\views_php\Plugin\views\field\ViewsPhp->buildOptionsForm(Array, Object(Drupal\Core\Form\FormState)) #4 [internal function]: Drupal\views_ui\Form\Ajax\ConfigHandler->buildForm(Array, Object(Drupal\Core\Form\FormState)) #5 C:\wamp64\www\PrevSol\core\lib\Drupal\Core\Form\FormBuilder.php(518): call_user_func_array(Array, Array) #6 C:\wamp64\www\PrevSol\core\lib\Drupal\Core\Form\FormBuilder.php(275): Drupal\Core\Form\FormBuilder->retrieveForm('views_ui_config...', Object(Drupal\Core\Form\FormState)) #7 C:\wamp64\www\PrevSol\core\modules\views_ui\src\Form\Ajax\ViewsFormBase.php(214): Drupal\Core\Form\FormBuilder->buildForm('views_ui_config...', Object(Drupal\Core\Form\FormState)) #8 C:\wamp64\www\PrevSol\core\lib\Drupal\Core\Render\Renderer.php(582): Drupal\views_ui\Form\Ajax\ViewsFormBase->Drupal\views_ui\Form\Ajax\{closure}() #9 C:\wamp64\www\PrevSol\core\modules\views_ui\src\Form\Ajax\ViewsFormBase.php(216): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure)) #10 C:\wamp64\www\PrevSol\core\modules\views_ui\src\Form\Ajax\ViewsFormBase.php(125): Drupal\views_ui\Form\Ajax\ViewsFormBase->ajaxFormWrapper('Drupal\\views_ui...', Object(Drupal\Core\Form\FormState)) #11 C:\wamp64\www\PrevSol\core\modules\views_ui\src\Form\Ajax\ConfigHandler.php(39): Drupal\views_ui\Form\Ajax\ViewsFormBase->getForm(Object(Drupal\views_ui\ViewUI), 'block_2', 'ajax') #12 [internal function]: Drupal\views_ui\Form\Ajax\ConfigHandler->getForm(Object(Drupal\views_ui\ViewUI), 'block_2', 'ajax', 'field', 'php') #13 C:\wamp64\www\PrevSol\core\lib\Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array(Array, Array) #14 C:\wamp64\www\PrevSol\core\lib\Drupal\Core\Render\Renderer.php(582): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #15 C:\wamp64\www\PrevSol\core\lib\Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber.php(124): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure)) #16 C:\wamp64\www\PrevSol\core\lib\Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) #17 C:\wamp64\www\PrevSol\vendor\symfony\http-kernel\HttpKernel.php(151): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #18 C:\wamp64\www\PrevSol\vendor\symfony\http-kernel\HttpKernel.php(68): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #19 C:\wamp64\www\PrevSol\core\lib\Drupal\Core\StackMiddleware\Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #20 C:\wamp64\www\PrevSol\core\lib\Drupal\Core\StackMiddleware\KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #21 C:\wamp64\www\PrevSol\core\modules\page_cache\src\StackMiddleware\PageCache.php(99): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #22 C:\wamp64\www\PrevSol\core\modules\page_cache\src\StackMiddleware\PageCache.php(78): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true) #23 C:\wamp64\www\PrevSol\core\lib\Drupal\Core\StackMiddleware\ReverseProxyMiddleware.php(47): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #24 C:\wamp64\www\PrevSol\core\lib\Drupal\Core\StackMiddleware\NegotiationMiddleware.php(52): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #25 C:\wamp64\www\PrevSol\vendor\stack\builder\src\Stack\StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #26 C:\wamp64\www\PrevSol\core\lib\Drupal\Core\DrupalKernel.php(665): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #27 C:\wamp64\www\PrevSol\index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #28 {main}.