enable apps failed

[azgh]

Steps to reproduce

1. click + apps
2. click productivity
3. enable calendar

Expected behaviour

calendar should be enabled

Actual behaviour

cURL error 51: SSL: no alternative certificate subject name matches target host name 'github-production-release-asset-2e65be.s3.amazonaws.com'

Server configuration

Operating system:
debian 8.8
Web server:
apache
Database:
mysql
PHP version:
php5.6.30
ownCloud version: (see ownCloud admin page)
owncloud 9.1.6 stable
Updated from an older ownCloud or fresh install:
from older owncloud
Where did you install ownCloud from:
owncloud 9.1.5
Signing status (ownCloud 9.0 and above):
succesful

[PVince81]

see owncloud/calendar#800

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.