Error when activating the module

@joro78
I'm planning to make complete refactoring of this module in the next few weeks. So this one will be also fixed.
Thanks a lot for you report.

Thanks for you answer @a.sotirov

We have installed the dev module on another site. We've enabled the test mode and set options as the example above.

The cart page opens, but econt delivery form is unavailable, and we receive other errors:

1) Местоположение /checkout/176/order_information?_wrapper_format=drupal_ajax&ajax_form=1
URL референт /checkout/176/order_information
Съобщение Exception occurred when calculating rates for Econt test: The provided value "" is not a numeric value.

2) Notice: Trying to get property 'total' of non-object in commerce_econt_send_request_xml() (line 461 of /modules/contrib/commerce_econt/commerce_econt.module)

#0 /core/includes/bootstrap.inc(347): _drupal_error_handler_real()
#1 /modules/contrib/commerce_econt/commerce_econt.module(461): _drupal_error_handler()
#2 /modules/contrib/commerce_econt/src/Plugin/Commerce/ShippingMethod/Econt.php(372): commerce_econt_send_request_xml()
#3 /modules/contrib/commerce_shipping/src/ShipmentManager.php(89): Drupal\commerce_econt\Plugin\Commerce\ShippingMethod\Econt->calculateRates()
#4 /modules/contrib/commerce_shipping/src/Plugin/Field/FieldWidget/ShippingRateWidget.php(100): Drupal\commerce_shipping\ShipmentManager->calculateRates()
#5 /core/lib/Drupal/Core/Field/WidgetBase.php(353): Drupal\commerce_shipping\Plugin\Field\FieldWidget\ShippingRateWidget->formElement()
#6 /core/lib/Drupal/Core/Field/WidgetBase.php(220): Drupal\Core\Field\WidgetBase->formSingleElement()
#7 /core/lib/Drupal/Core/Field/WidgetBase.php(111): Drupal\Core\Field\WidgetBase->formMultipleElements()
#8 /core/lib/Drupal/Core/Entity/Entity/EntityFormDisplay.php(183): Drupal\Core\Field\WidgetBase->form()
#9 /modules/contrib/commerce_shipping/src/Plugin/Commerce/CheckoutPane/ShippingInformation.php(335): Drupal\Core\Entity\Entity\EntityFormDisplay->buildForm()
#10 /modules/contrib/commerce/modules/checkout/src/Plugin/Commerce/CheckoutFlow/CheckoutFlowWithPanesBase.php(546): Drupal\commerce_shipping\Plugin\Commerce\CheckoutPane\ShippingInformation->buildPaneForm()
#11 [internal function]: Drupal\commerce_checkout\Plugin\Commerce\CheckoutFlow\CheckoutFlowWithPanesBase->buildForm()
#12 /core/lib/Drupal/Core/Form/FormBuilder.php(534): call_user_func_array()
#13 /core/lib/Drupal/Core/Form/FormBuilder.php(281): Drupal\Core\Form\FormBuilder->retrieveForm()
#14 /core/lib/Drupal/Core/Form/FormBuilder.php(222): Drupal\Core\Form\FormBuilder->buildForm()
#15 /modules/contrib/commerce/modules/checkout/src/Controller/CheckoutController.php(143): Drupal\Core\Form\FormBuilder->getForm()
#16 [internal function]: Drupal\commerce_checkout\Controller\CheckoutController->formPage()
#17 /core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array()
#18 /core/lib/Drupal/Core/Render/Renderer.php(580): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
#19 /core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(124): Drupal\Core\Render\Renderer->executeInRenderContext()
#20 /core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext()
#21 /vendor/symfony/http-kernel/HttpKernel.php(169): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
#22 /vendor/symfony/http-kernel/HttpKernel.php(81): Symfony\Component\HttpKernel\HttpKernel->handleRaw()
#23 /core/lib/Drupal/Core/StackMiddleware/Session.php(58): Symfony\Component\HttpKernel\HttpKernel->handle()
#24 /core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle()
#25 /core/modules/page_cache/src/StackMiddleware/PageCache.php(106): Drupal\Core\StackMiddleware\KernelPreHandle->handle()
#26 /core/modules/page_cache/src/StackMiddleware/PageCache.php(85): Drupal\page_cache\StackMiddleware\PageCache->pass()
#27 /core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(48): Drupal\page_cache\StackMiddleware\PageCache->handle()
#28 /core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle()
#29 /vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle()
#30 /core/lib/Drupal/Core/DrupalKernel.php(718): Stack\StackedHttpKernel->handle()
#31 /index.php(19): Drupal\Core\DrupalKernel->handle()
#32 {main}

We, and I suppose the Drupal community in Bulgaria, shall really be happy using this module =)

Successful work!