Updating from 21.0.4 to 21.0.7 not working

Hello

I just started the upater to update from 21.0.4 to 21.0.7.
But the only thing what is happening is this:

Initializing

Current version is 21.0.4.

If I open the log I see a lot of entries like this:

Error	internet_connection_check	GuzzleHttp\Exception\RequestException: cURL error 60: SSL certificate problem: certificate has expired (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://www.nextcloud.com/

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Handler/CurlFactory.php - line 158:

    GuzzleHttp\Handler\CurlFactory::createRejection(GuzzleHttp\H ... l}, { 0: "And 29 ... l})

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Handler/CurlFactory.php - line 110:

    GuzzleHttp\Handler\CurlFactory::finishError(GuzzleHttp\H ... {}, GuzzleHttp\H ... l}, GuzzleHttp\H ... {})

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Handler/CurlHandler.php - line 47:

    GuzzleHttp\Handler\CurlFactory::finish(GuzzleHttp\H ... {}, GuzzleHttp\H ... l}, GuzzleHttp\H ... {})

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Handler/Proxy.php - line 28:

    GuzzleHttp\Handler\CurlHandler->__invoke("*** sensiti ... *", "*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Handler/Proxy.php - line 48:

    GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler\{closure}("*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/PrepareBodyMiddleware.php - line 35:

    GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler\{closure}("*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Middleware.php - line 31:

    GuzzleHttp\PrepareBodyMiddleware->__invoke("*** sensiti ... *", "*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/RedirectMiddleware.php - line 71:

    GuzzleHttp\Middleware::GuzzleHttp\{closure}("*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/RedirectMiddleware.php - line 99:

    GuzzleHttp\RedirectMiddleware->__invoke("*** sensiti ... *", "*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/RedirectMiddleware.php - line 73:

    GuzzleHttp\RedirectMiddleware->checkRedirect(GuzzleHttp\Psr7\Request {}, "*** sensiti ... *", "*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/promises/src/FulfilledPromise.php - line 41:

    GuzzleHttp\RedirectMiddleware->GuzzleHttp\{closure}("*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/promises/src/TaskQueue.php - line 48:

    GuzzleHttp\Promise\FulfilledPromise::GuzzleHttp\Promise\{closure}("*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/promises/src/Promise.php - line 248:

    GuzzleHttp\Promise\TaskQueue->run(true)

    /home/www/nextcloud/3rdparty/guzzlehttp/promises/src/Promise.php - line 224:

    GuzzleHttp\Promise\Promise->invokeWaitFn()

    /home/www/nextcloud/3rdparty/guzzlehttp/promises/src/Promise.php - line 269:

    GuzzleHttp\Promise\Promise->waitIfPending()

    /home/www/nextcloud/3rdparty/guzzlehttp/promises/src/Promise.php - line 226:

    GuzzleHttp\Promise\Promise->invokeWaitList()

    /home/www/nextcloud/3rdparty/guzzlehttp/promises/src/Promise.php - line 62:

    GuzzleHttp\Promise\Promise->waitIfPending()

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Client.php - line 187:

    GuzzleHttp\Promise\Promise->wait()

    /home/www/nextcloud/lib/private/Http/Client/Client.php - line 236:

    GuzzleHttp\Client->request("get", "http://www.nextcloud.com/", { verify: "/ ... e})

    /home/www/nextcloud/apps/settings/lib/Controller/CheckSetupController.php - line 178:

    OC\Http\Client\Client->get("http://www.nextcloud.com/")

    /home/www/nextcloud/apps/settings/lib/Controller/CheckSetupController.php - line 161:

    OCA\Settings\Controller\CheckSetupController->isSiteReachable("www.nextcloud.com")

    /home/www/nextcloud/apps/settings/lib/Controller/CheckSetupController.php - line 734:

    OCA\Settings\Controller\CheckSetupController->hasInternetConnectivityProblems()

    /home/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 218:

    OCA\Settings\Controller\CheckSetupController->check()

    /home/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 127:

    OC\AppFramework\Http\Dispatcher->executeController(OCA\Settings ... {}, "check")

    /home/www/nextcloud/lib/private/AppFramework/App.php - line 157:

    OC\AppFramework\Http\Dispatcher->dispatch(OCA\Settings ... {}, "check")

    /home/www/nextcloud/lib/private/Route/Router.php - line 302:

    OC\AppFramework\App::main("OCA\\Settin ... r", "check", OC\AppFramew ... {}, { _route: "s ... "})

    /home/www/nextcloud/lib/base.php - line 993:

    OC\Route\Router->match("/settings/ajax/checksetup")

    /home/www/nextcloud/index.php - line 37:

    OC::handleRequest()

Warning	appstoreFetcher	GuzzleHttp\Exception\RequestException: cURL error 60: SSL certificate problem: certificate has expired (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://apps.nextcloud.com/api/v1/apps.json

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Handler/CurlFactory.php - line 158:

    GuzzleHttp\Handler\CurlFactory::createRejection(GuzzleHttp\H ... l}, { 0: "And 29 ... l})

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Handler/CurlFactory.php - line 110:

    GuzzleHttp\Handler\CurlFactory::finishError(GuzzleHttp\H ... {}, GuzzleHttp\H ... l}, GuzzleHttp\H ... {})

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Handler/CurlHandler.php - line 47:

    GuzzleHttp\Handler\CurlFactory::finish(GuzzleHttp\H ... {}, GuzzleHttp\H ... l}, GuzzleHttp\H ... {})

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Handler/Proxy.php - line 28:

    GuzzleHttp\Handler\CurlHandler->__invoke("*** sensiti ... *", "*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Handler/Proxy.php - line 48:

    GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler\{closure}("*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/PrepareBodyMiddleware.php - line 35:

    GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler\{closure}("*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Middleware.php - line 31:

    GuzzleHttp\PrepareBodyMiddleware->__invoke("*** sensiti ... *", "*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/RedirectMiddleware.php - line 71:

    GuzzleHttp\Middleware::GuzzleHttp\{closure}("*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Middleware.php - line 63:

    GuzzleHttp\RedirectMiddleware->__invoke("*** sensiti ... *", "*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/HandlerStack.php - line 75:

    GuzzleHttp\Middleware::GuzzleHttp\{closure}("*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Client.php - line 331:

    GuzzleHttp\HandlerStack->__invoke("*** sensiti ... *", "*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Client.php - line 168:

    GuzzleHttp\Client->transfer("*** sensiti ... *", "*** sensiti ... *")

    /home/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Client.php - line 187:

    GuzzleHttp\Client->requestAsync("get", GuzzleHttp\Psr7\Uri {}, { 0: "And 5 ... }})

    /home/www/nextcloud/lib/private/Http/Client/Client.php - line 236:

    GuzzleHttp\Client->request("get", "https://app ... n", { verify: "/ ... e})

    /home/www/nextcloud/lib/private/App/AppStore/Fetcher/Fetcher.php - line 116:

    OC\Http\Client\Client->get("https://app ... n", { timeout: 60})

    /home/www/nextcloud/lib/private/App/AppStore/Fetcher/AppFetcher.php - line 88:

    OC\App\AppStore\Fetcher\Fetcher->fetch("", "")

    /home/www/nextcloud/lib/private/App/AppStore/Fetcher/Fetcher.php - line 188:

    OC\App\AppStore\Fetcher\AppFetcher->fetch("", "", false)

    /home/www/nextcloud/apps/updatenotification/lib/Controller/APIController.php - line 103:

    OC\App\AppStore\Fetcher\Fetcher->get()

    /home/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 218:

    OCA\UpdateNotification\Controller\APIController->getAppList("21.0.7.0")

    /home/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 127:

    OC\AppFramework\Http\Dispatcher->executeController(OCA\UpdateNo ... {}, "getAppList")

    /home/www/nextcloud/lib/private/AppFramework/App.php - line 157:

    OC\AppFramework\Http\Dispatcher->dispatch(OCA\UpdateNo ... {}, "getAppList")

    /home/www/nextcloud/lib/private/Route/Router.php - line 302:

    OC\AppFramework\App::main("OCA\\Update ... r", "getAppList", OC\AppFramew ... {}, { apiVersion ... "})

    /home/www/nextcloud/ocs/v1.php - line 63:

    OC\Route\Router->match("/ocsapp/app ... 0")

    /home/www/nextcloud/ocs/v2.php - line 24:

    require_once("/home/www/n ... p")

I can wait for minutes, but nothing is happening.
What can I do?

Thanks Andreas