cannot install openvpn

[prosoor]

sudo apt-get install network-manager-openvpn

Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
linux-headers-4.4.0-15 linux-headers-4.4.0-15-generic linux-headers-4.4.0-16
linux-headers-4.4.0-16-generic linux-image-4.4.0-15-generic
linux-image-4.4.0-16-generic linux-image-extra-4.4.0-15-generic
linux-image-extra-4.4.0-16-generic
Use 'sudo apt autoremove' to remove them.
The following NEW packages will be installed:
network-manager-openvpn
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 26,3 kB of archives.
After this operation, 100 kB of additional disk space will be used.
Err:1 http://hr.archive.ubuntu.com/ubuntu xenial/universe amd64 network-manager-openvpn amd64 1.1.93-1
404 Not Found
E: Failed to fetch http://hr.archive.ubuntu.com/ubuntu/...93-1_amd64.deb 404 Not Found

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

[Snowhog]

Try changing the server being used (Croatia).