cURL error 7: Failed to connect to www.mindomo.com port 443 after 12 ms: Connection refused (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://www.mindomo.com/help/desktop/tasks/subscriptions/classroom-exercises/mind-mapping/basics/assignments/mobile/integrations/lti/assignments/administration/images/summary2.png