Collabora unkown Curl Error 77

Hello,

i have setup Collabora in an Docker Container with the offical guide.
But i get this error Message when i open Collabora:

> Exception: {"Exception":"GuzzleHttp\\Exception\\RequestException","Message":"cURL error 77: ","Code":0,"Trace":"#0 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/3rdparty\/guzzlehttp\/guzzle\/src\/RequestFsm.php(103): GuzzleHttp\\Exception\\RequestException::wrapException(Object(GuzzleHttp\\Message\\Request), Object(GuzzleHttp\\Ring\\Exception\\RingException))\n#1 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/3rdparty\/guzzlehttp\/guzzle\/src\/RequestFsm.php(132): GuzzleHttp\\RequestFsm->__invoke(Object(GuzzleHttp\\Transaction))\n#2 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/3rdparty\/react\/promise\/src\/FulfilledPromise.php(25): GuzzleHttp\\RequestFsm->GuzzleHttp\\{closure}(Array)\n#3 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/3rdparty\/guzzlehttp\/ringphp\/src\/Future\/CompletedFutureValue.php(55): React\\Promise\\FulfilledPromise->then(Object(Closure), NULL, NULL)\n#4 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/3rdparty\/guzzlehttp\/guzzle\/src\/Message\/FutureResponse.php(43): GuzzleHttp\\Ring\\Future\\CompletedFutureValue->then(Object(Closure), NULL, NULL)\n#5 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/3rdparty\/guzzlehttp\/guzzle\/src\/RequestFsm.php(134): GuzzleHttp\\Message\\FutureResponse::proxy(Object(GuzzleHttp\\Ring\\Future\\CompletedFutureArray), Object(Closure))\n#6 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/3rdparty\/guzzlehttp\/guzzle\/src\/Client.php(165): GuzzleHttp\\RequestFsm->__invoke(Object(GuzzleHttp\\Transaction))\n#7 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/3rdparty\/guzzlehttp\/guzzle\/src\/Client.php(125): GuzzleHttp\\Client->send(Object(GuzzleHttp\\Message\\Request))\n#8 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/lib\/private\/Http\/Client\/Client.php(137): GuzzleHttp\\Client->get('https:\/\/www.own...', Array)\n#9 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/settings\/Controller\/CheckSetupController.php(195): OC\\Http\\Client\\Client->get('https:\/\/www.own...')\n#10 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/settings\/Controller\/CheckSetupController.php(346): OC\\Settings\\Controller\\CheckSetupController->isUsedTlsLibOutdated()\n#11 [internal function]: OC\\Settings\\Controller\\CheckSetupController->check()\n#12 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/lib\/private\/AppFramework\/Http\/Dispatcher.php(160): call_user_func_array(Array, Array)\n#13 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/lib\/private\/AppFramework\/Http\/Dispatcher.php(90): OC\\AppFramework\\Http\\Dispatcher->executeController(Object(OC\\Settings\\Controller\\CheckSetupController), 'check')\n#14 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/lib\/private\/AppFramework\/App.php(111): OC\\AppFramework\\Http\\Dispatcher->dispatch(Object(OC\\Settings\\Controller\\CheckSetupController), 'check')\n#15 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/lib\/private\/AppFramework\/Routing\/RouteActionHandler.php(47): OC\\AppFramework\\App::main('CheckSetupContr...', 'check', Object(OC\\AppFramework\\DependencyInjection\\DIContainer), Array)\n#16 [internal function]: OC\\AppFramework\\Routing\\RouteActionHandler->__invoke(Array)\n#17 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/lib\/private\/Route\/Router.php(293): call_user_func(Object(OC\\AppFramework\\Routing\\RouteActionHandler), Array)\n#18 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/lib\/base.php(983): OC\\Route\\Router->match('\/settings\/ajax\/...')\n#19 \/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/index.php(48): OC::handleRequest()\n#20 {main}","File":"\/var\/www\/vhosts\/land-laeufer.de\/cloud.land-laeufer.de\/3rdparty\/guzzlehttp\/guzzle\/src\/Exception\/RequestException.php","Line":51}

i don know what it is, can anyone help me?