I installed it on a VPS and any time I try and install a software it fails to download the files say “Unable to fetch sources files”. Even when I try to use a direct download (ie: https://github.com/Kloadut/owncloud_ynh[1] ) it tells me “Invalid app manifest”
Some notes: I am running it in a VPS. The VPS is a OpenVZ container running Debian 7. It is hosted through a proxmox host that I have. If the specs are needed of that I can pull them yp.
Sorry for bumping this very old topic, but I’ve experienced a similar problem.
If it can help anyone, in my case, the cause was that I was blocking the Javascript code from the raw.githubusercontent.com URL (with the NoScript addon). If you don’t have a Javascript blocker, check if another extension is blocking 3rd party request (like uBlock Origin or AdBlock Plus).