GuzzleHttp\Exception\ClientException: Client error: `GET https://restcountries.eu/rest/v2/all` resulted in a `404 Not Found` response: 404 page not found in GuzzleHttp\Exception\RequestException::create() (line 113 of vendor/guzzlehttp/guzzle/src/Exceptio

I get the below error at the moment of adding a External Data Source Field
I'm using Drupal 10.3.1 and PHP 8.2.21

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GuzzleHttp\Exception\ClientException: Client error: `GET https://restcountries.eu/rest/v2/all` resulted in a `404 Not Found` response: 404 page not found in GuzzleHttp\Exception\RequestException::create() (line 113 of vendor/guzzlehttp/guzzle/src/Exception/RequestException.php).
GuzzleHttp\Middleware::GuzzleHttp\{closure}() (Line: 209)
GuzzleHttp\Promise\Promise::callHandler() (Line: 158)
GuzzleHttp\Promise\Promise::GuzzleHttp\Promise\{closure}() (Line: 52)
GuzzleHttp\Promise\TaskQueue->run() (Line: 251)
GuzzleHttp\Promise\Promise->invokeWaitFn() (Line: 227)
GuzzleHttp\Promise\Promise->waitIfPending() (Line: 272)
GuzzleHttp\Promise\Promise->invokeWaitList() (Line: 229)
GuzzleHttp\Promise\Promise->waitIfPending() (Line: 69)
GuzzleHttp\Promise\Promise->wait() (Line: 189)
GuzzleHttp\Client->request() (Line: 44)
GuzzleHttp\Client->get() (Line: 63)
Drupal\external_data_source\Plugin\ExternalDataSource\Countries->getResponse() (Line: 79)
Drupal\external_data_source\Controller\ExternalDataSourceController->optionsForSelect() (Line: 124)
Drupal\external_data_source\Plugin\Field\FieldWidget\ExternalDataSourceSelectWidget->formElement() (Line: 459)
Drupal\Core\Field\WidgetBase->formSingleElement() (Line: 101)
Drupal\Core\Field\WidgetBase->form() (Line: 287)
Drupal\Core\Field\FieldItemList->defaultValuesForm() (Line: 230)
Drupal\field_ui\Form\FieldConfigEditForm->form() (Line: 107)
Drupal\Core\Entity\EntityForm->buildForm()
call_user_func_array() (Line: 536)
Drupal\Core\Form\FormBuilder->retrieveForm() (Line: 284)
Drupal\Core\Form\FormBuilder->buildForm() (Line: 48)
Drupal\Core\Entity\EntityFormBuilder->getForm() (Line: 62)
Drupal\field_ui\Controller\FieldConfigAddController->fieldConfigAddConfigureForm()
call_user_func_array() (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 638)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 121)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext() (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 181)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 53)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 741)
Drupal\Core\DrupalKernel->handle() (Line: 19)