NextcloudPi appstore cUrl error 6, can't install anything!

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where is the solution ?

I have the following errors. I can’t download or install anything

Could not connect to appstore: cURL error 6: Could not resolve host: api.nextcloud.com (see https://curl.haxx.se/libcurl/c/libcurl-errors.html)

GuzzleHttp\Exception\ClientException: Client error: GET https://apps.nextcloud.com/apps.json resulted in a 404 Not Found response: <meta name=“viewport” content="width=device-wid (truncated…)

  1. /var/www/html/nextcloud/3rdparty/guzzlehttp/guzzle/src/Middleware.php - line 65:GuzzleHttp\Exception\RequestException::create()
  2. /var/www/html/nextcloud/3rdparty/guzzlehttp/promises/src/Promise.php - line 203:GuzzleHttp\Middleware::GuzzleHttp{closure}("*** sensiti … *")
  3. /var/www/html/nextcloud/3rdparty/guzzlehttp/promises/src/Promise.php - line 156:GuzzleHttp\Promise\Promise::callHandler()
  4. /var/www/html/nextcloud/3rdparty/guzzlehttp/promises/src/TaskQueue.php - line 47:GuzzleHttp\Promise\Promise::GuzzleHttp\Promise{closure}("*** sensiti … *")
  5. /var/www/html/nextcloud/3rdparty/guzzlehttp/promises/src/Promise.php - line 246:GuzzleHttp\Promise\TaskQueue->run()
  6. /var/www/html/nextcloud/3rdparty/guzzlehttp/promises/src/Promise.php - line 223:GuzzleHttp\Promise\Promise->invokeWaitFn()
  7. /var/www/html/nextcloud/3rdparty/guzzlehttp/promises/src/Promise.php - line 267:GuzzleHttp\Promise\Promise->waitIfPending()
  8. /var/www/html/nextcloud/3rdparty/guzzlehttp/promises/src/Promise.php - line 225:GuzzleHttp\Promise\Promise->invokeWaitList()
  9. /var/www/html/nextcloud/3rdparty/guzzlehttp/promises/src/Promise.php - line 62:GuzzleHttp\Promise\Promise->waitIfPending()
  10. /var/www/html/nextcloud/3rdparty/guzzlehttp/guzzle/src/Client.php - line 183:GuzzleHttp\Promise\Promise->wait()
  11. /var/www/html/nextcloud/lib/private/Http/Client/Client.php - line 228:GuzzleHttp\Client->request()
  12. /var/www/html/nextcloud/lib/private/App/AppStore/Fetcher/Fetcher.php - line 109:OC\Http\Client\Client->get()
  13. /var/www/html/nextcloud/lib/private/App/AppStore/Fetcher/AppFetcher.php - line 86:OC\App\AppStore\Fetcher\Fetcher->fetch()
  14. /var/www/html/nextcloud/lib/private/App/AppStore/Fetcher/Fetcher.php - line 173:OC\App\AppStore\Fetcher\AppFetcher->fetch()
  15. /var/www/html/nextcloud/lib/private/Installer.php - line 408:OC\App\AppStore\Fetcher\Fetcher->get()
  16. /var/www/html/nextcloud/apps/settings/lib/Controller/AppSettingsController.php - line 255:OC\Installer->isUpdateAvailable()
  17. <>OCA\Settings\Controller\AppSettingsController->OCA\Settings\Controller{closure}("*** sensiti … *")
  18. /var/www/html/nextcloud/apps/settings/lib/Controller/AppSettingsController.php - line 248:array_map()
  19. /var/www/html/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 170:OCA\Settings\Controller\AppSettingsController->listApps()
  20. /var/www/html/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 100:OC\AppFramework\Http\Dispatcher->executeController()
  21. /var/www/html/nextcloud/lib/private/AppFramework/App.php - line 137:OC\AppFramework\Http\Dispatcher->dispatch()
  22. /var/www/html/nextcloud/lib/private/AppFramework/Routing/RouteActionHandler.php - line 47:OC\AppFramework\App::main()
  23. <>OC\AppFramework\Routing\RouteActionHandler->__invoke()
  24. /var/www/html/nextcloud/lib/private/Route/Router.php - line 297:call_user_func()
  25. /var/www/html/nextcloud/lib/base.php - line 1007:OC\Route\Router->match()
  26. /var/www/html/nextcloud/index.php - line 37:OC::handleRequest() 2020-07-16T09:39:04+0200
    Warning appstoreFetcher GuzzleHttp\Exception\ClientException: Client error: GET https://apps.nextcloud.com/categories.json resulted in a 404 Not Found response: <meta name=“viewport” content="width=device-wid (truncated…)

does anyone have a solution?