Error in opigno group

Hello! I'm experiencing the following problem (installend Opigno 2.6 with Composer) When I create a Group (i.e. Course) I'm getting the following error... see below It points to line 1434 in a Opigno file ( $group_visibility = $group->field_learning_path_visibility->value; ) but apparently doesn't receive the wanted input. Does anyone know how to solve this? Was the database properly updated? Thnx Notice: Trying to get property of non-object in opigno_learning_path_group_access() (line 1434 of modules/contrib/opigno_learning_path/opigno_learning_path.module). opigno_learning_path_group_access(Object, 'view', Object) call_user_func_array('opigno_learning_path_group_access', Array) (Line: 403) Drupal\Core\Extension\ModuleHandler->invokeAll('group_access', Array) (Line: 97) Drupal\Core\Entity\EntityAccessControlHandler->access(Object, 'view', Object, 1) (Line: 709) Drupal\Core\Entity\ContentEntityBase->access('view', Object, 1) (Line: 65) Drupal\Core\Entity\EntityAccessCheck->access(Object, Object, Object) call_user_func_array(Array, Array) (Line: 159) Drupal\Core\Access\AccessManager->performCheck('access_check.entity', Object) (Line: 135) Drupal\Core\Access\AccessManager->check(Object, Object, Object, 1) (Line: 112) Drupal\Core\Access\AccessManager->checkRequest(Object, Object, 1) (Line: 109) Drupal\Core\Routing\AccessAwareRouter->checkAccess(Object) (Line: 94) Drupal\Core\Routing\AccessAwareRouter->matchRequest(Object) (Line: 115) Symfony\Component\HttpKernel\EventListener\RouterListener->onKernelRequest(Object, 'kernel.request', Object) call_user_func(Array, Object, 'kernel.request', Object) (Line: 111) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.request', Object) (Line: 127) 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: 106) Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85) 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: 693) Drupal\Core\DrupalKernel->handle(Object) (Line: 19)