Hi,
I got this error in the past few days when doing apt-get update:
E: Failed to fetch http://geany.nightlybuilds.org/debian/stretch/dists/stable/main/binary-amd64... Cannot initiate the connection to geany.nightlybuilds.org:80 (2a03:4000:6:421c:99::172). - connect (101: Network is unreachable) [IP: 2a03:4000:6:421c:99::172 80]
Is the site down?
Cheers, -- st