Error when configurating Ethereum and Ethereum User Connector

[zhous]

Drupal 8.6.10 on PHP 7.3.
Network: Ropsten

admin/config/ethereum/user-connector

Error: Class 'Ethereum\Ethereum' not found in Drupal\ethereum\EthereumClientFactory->get() (line 46 of /home/sth/public_html/modules/ethereum/src/EthereumClientFactory.php) #0 /home/sth/public_html/modules/ethereum/src/Entity/EthereumServer.php(149): Drupal\ethereum\EthereumClientFactory->get('https://ropsten...') #1 /home/sth/public_html/modules/ethereum/src/Form/EthereumSettingsForm.php(82): Drupal\ethereum\Entity\EthereumServer->validateConnection() #2 [internal function]: Drupal\ethereum\Form\EthereumSettingsForm->buildForm(Array, Object(Drupal\Core\Form\FormState)) #3 /home/sth/public_html/core/lib/Drupal/Core/Form/FormBuilder.php(518): call_user_func_array(Array, Array) #4 /home/sth/public_html/core/lib/Drupal/Core/Form/FormBuilder.php(275): Drupal\Core\Form\FormBuilder->retrieveForm('ethereum_settin...', Object(Drupal\Core\Form\FormState)) #5 /home/sth/public_html/core/lib/Drupal/Core/Controller/FormController.php(93): Drupal\Core\Form\FormBuilder->buildForm('ethereum_settin...', Object(Drupal\Core\Form\FormState)) #6 [internal function]: Drupal\Core\Controller\FormController->getContentResult(Object(Symfony\Component\HttpFoundation\Request), Object(Drupal\Core\Routing\RouteMatch)) #7 /home/sth/public_html/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array(Array, Array) #8 /home/sth/public_html/core/lib/Drupal/Core/Render/Renderer.php(582): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber{closure}() #9 /home/sth/public_html/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(124): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure)) #10 /home/sth/public_html/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) #11 /home/sth/public_html/vendor/symfony/http-kernel/HttpKernel.php(151): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber{closure}() #12 /home/sth/public_html/vendor/symfony/http-kernel/HttpKernel.php(68): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #13 /home/sth/public_html/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #14 /home/sth/public_html/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #15 /home/sth/public_html/core/modules/page_cache/src/StackMiddleware/PageCache.php(99): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #16 /home/sth/public_html/core/modules/page_cache/src/StackMiddleware/PageCache.php(78): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true) #17 /home/sth/public_html/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #18 /home/sth/public_html/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(52): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #19 /home/sth/public_html/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #20 /home/sth/public_html/core/lib/Drupal/Core/DrupalKernel.php(693): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #21 /home/sth/public_html/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #22 {main}.

[zhous]

This work is amazing to be finished on 2017. Please give it a fix.
Thanks a lot!

[digitaldonkey]

Seems like a old bug. Anyone on that now?