i have problems with Nextcloud 12 and Collabora in an docker container. Running with Debian 9, PHP 7.0 and Apache2.
I have installed Collabora with the installation guide and Nextcloud ist running fine with an wildcard certificate for our company domain my.domain.de
Nextcloud has a vhost file for cloud.my.domain.de and Collabora has a vhost file (like in the guide) for collabora.my.domain.de.
But Collabora cannot open any file in nextcloud (internal server error) and in the nextcloud logs ist this error message after opening a file:
GuzzleHttp\Exception\RequestException: cURL error 60: SSL certificate problem: unable to get local issuer certificate
Where is the mistake?