Postfinance Customweb

Hallo.
Wir bekommen die Zahlungsarten von Postfinance Checkout (Kreditkarte, Twint, eFinance…) im Frontend nicht mehr angezeigt und im Backend kommt beim Aufruf einer Bestellung folgender Fehller:
###php
Ups! An error has occurred! The following hints should help you.
Error 301 connecting to the API (https://www.postfinance-checkout.ch//api/currency/all) : in custom/plugins/PostFinanceCheckoutPayment/vendor/PostFinanceCheckout/Sdk/lib/ApiClient.php on line 466 Stack trace:
#0 custom/plugins/PostFinanceCheckoutPayment/vendor/PostFinanceCheckout/Sdk/lib/Service/CurrencyService.php(129): PostFinanceCheckout\Sdk\ApiClient->callApi()
#1 custom/plugins/PostFinanceCheckoutPayment/vendor/PostFinanceCheckout/Sdk/lib/Service/CurrencyService.php(80): PostFinanceCheckout\Sdk\Service\CurrencyService->allWithHttpInfo()
#2 custom/plugins/PostFinanceCheckoutPayment/Components/Provider/Currency.php(74): PostFinanceCheckout\Sdk\Service\CurrencyService->all()
#3 custom/plugins/PostFinanceCheckoutPayment/Components/Provider/AbstractProvider.php(95): PostFinanceCheckoutPayment\Components\Provider\Currency->fetchData()
#4 custom/plugins/PostFinanceCheckoutPayment/Components/Provider/AbstractProvider.php(112): PostFinanceCheckoutPayment\Components\Provider\AbstractProvider->PostFinanceCheckoutPayment\Components\Provider{closure}()
#5 custom/plugins/PostFinanceCheckoutPayment/Components/Provider/AbstractProvider.php(96): PostFinanceCheckoutPayment\Components\Provider\AbstractProvider->callApi()
#6 custom/plugins/PostFinanceCheckoutPayment/Components/Provider/AbstractProvider.php(64): PostFinanceCheckoutPayment\Components\Provider\AbstractProvider->loadData()
#7 custom/plugins/PostFinanceCheckoutPayment/Components/Provider/Currency.php(42): PostFinanceCheckoutPayment\Components\Provider\AbstractProvider->find()
#8 custom/plugins/PostFinanceCheckoutPayment/Components/Provider/Currency.php(63): PostFinanceCheckoutPayment\Components\Provider\Currency->find()
#9 custom/plugins/PostFinanceCheckoutPayment/Components/ArrayBuilder/TransactionInfo.php(149): PostFinanceCheckoutPayment\Components\Provider\Currency->getFractionDigits()
#10 custom/plugins/PostFinanceCheckoutPayment/Components/TransactionInfo.php(301): PostFinanceCheckoutPayment\Components\ArrayBuilder\TransactionInfo->build()
#11 custom/plugins/PostFinanceCheckoutPayment/Controllers/Backend/PostFinanceCheckoutPaymentTransaction.php(254): PostFinanceCheckoutPayment\Components\TransactionInfo->buildTransactionInfoAsArray()
#12 engine/Library/Enlight/Controller/Action.php(192): Shopware_Controllers_Backend_PostFinanceCheckoutPaymentTransaction->getTransactionsAction()
#13 engine/Library/Enlight/Controller/Dispatcher/Default.php(478): Enlight_Controller_Action->dispatch()
#14 engine/Library/Enlight/Controller/Front.php(228): Enlight_Controller_Dispatcher_Default->dispatch()
#15 engine/Shopware/Kernel.php(188): Enlight_Controller_Front->dispatch()
#16 vendor/symfony/http-kernel/HttpCache/SubRequestHandler.php(102): Shopware\Kernel->handle()
#17 vendor/symfony/http-kernel/HttpCache/HttpCache.php(453): Symfony\Component\HttpKernel\HttpCache\SubRequestHandler::handle()
#18 engine/Shopware/Components/HttpCache/AppCache.php(261): Symfony\Component\HttpKernel\HttpCache\HttpCache->forward()
#19 vendor/symfony/http-kernel/HttpCache/HttpCache.php(238): Shopware\Components\HttpCache\AppCache->forward()
#20 engine/Shopware/Components/HttpCache/AppCache.php(102): Symfony\Component\HttpKernel\HttpCache\HttpCache->pass()
#21 shopware.php(122): Shopware\Components\HttpCache\AppCache->handle() #22 {main}

Das Plugin ist von Customweb/Postfinance. Die haben leider schon geschlossen.
Kann damit jemand etwas anfangen?
Danke und Gruss.