Notice : warning pls check

Notice: Undefined property: stdClass::$form_selection in Drupal\if_then_else\core\Nodes\Conditions\PeriodicExecutionCondition\PeriodicExecutionCondition->process() (line 74 of modules/contrib/if_then_else/src/core/Nodes/Conditions/PeriodicExecutionCondition/PeriodicExecutionCondition.php).
Drupal\if_then_else\core\Nodes\Conditions\PeriodicExecutionCondition\PeriodicExecutionCondition->process() (Line: 100)
Drupal\if_then_else\Controller\IfThenElseController::process('init_event', Array) (Line: 23)
Drupal\if_then_else\EventSubscriber\IfthenelseSubscriber->registerIfThenElseEvent(Object, 'kernel.request', Object)
call_user_func(Array, Object, 'kernel.request', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.request', Object) (Line: 127)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 45)
Drupal\jsonapi\StackMiddleware\FormatSetter->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 693)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
Notice: Undefined property: stdClass::$form_selection in Drupal\if_then_else\core\Nodes\Conditions\PeriodicExecutionCondition\PeriodicExecutionCondition->process() (line 77 of modules/contrib/if_then_else/src/core/Nodes/Conditions/PeriodicExecutionCondition/PeriodicExecutionCondition.php).
Drupal\if_then_else\core\Nodes\Conditions\PeriodicExecutionCondition\PeriodicExecutionCondition->process() (Line: 100)
Drupal\if_then_else\Controller\IfThenElseController::process('init_event', Array) (Line: 23)
Drupal\if_then_else\EventSubscriber\IfthenelseSubscriber->registerIfThenElseEvent(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: 45)
Drupal\jsonapi\StackMiddleware\FormatSetter->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)