The 'core_version_requirement' key must be present in themes/contrib/adoption_navbar/web/core/themes/olivero/olivero.info.yml

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Drupal\Core\Extension\InfoParserException: The 'core_version_requirement' key must be present in themes/contrib/adoption_navbar/web/core/themes/olivero/olivero.info.yml in Drupal\Core\Extension\InfoParserDynamic->parse() (line 68 of core\lib\Drupal\Core\Extension\InfoParserDynamic.php).
Drupal\Core\Extension\InfoParser->parse('themes/contrib/adoption_navbar/web/core/themes/olivero/olivero.info.yml') (Line: 554)
Drupal\Core\Extension\ExtensionList->createExtensionInfo(Object) (Line: 266)
Drupal\Core\Extension\ThemeExtensionList->createExtensionInfo(Object) (Line: 316)
Drupal\Core\Extension\ExtensionList->doList() (Line: 113)
Drupal\Core\Extension\ThemeExtensionList->doList() (Line: 282)
Drupal\Core\Extension\ExtensionList->getList() (Line: 128)
Drupal\Core\Extension\ThemeHandler->rebuildThemeData() (Line: 204)
Drupal\system\Controller\SystemController->themesPage()
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 580)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 163)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 74)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
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: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 686)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19