No marketplace connection: cURL error 6

Hello everyone :wink:

I have an OwCloud server on debian9 virtual machine. On a Windows server 2012 virtual machine i have an active directory and my dns server. I succeeded to synchronize my AD users with nextcloud, it's so cool ! But i have a new problem, I can not access to the marketplace today I have this error :

"No marketplace connection: cURL error 6: Could not resolve host"

My DNS server seems to work well, do you have an idea?

Thanks ! And sorry for my english I'm french :slight_smile: