[kubuntu] Unable to fetch libreoffice-kde (among some others). Help?

Code:

sudo apt install libreoffice-kde
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  libreoffice-common libreoffice-core libreoffice-style-breeze libreoffice-style-galaxy python3-uno
Suggested packages:
  libreoffice-style-crystal libreoffice-style-hicontrast libreoffice-style-human libreoffice-style-oxygen libreoffice-style-sifr
  libreoffice-style-tango konqueror libreoffice-kab
The following NEW packages will be installed:
  libreoffice-common libreoffice-core libreoffice-kde libreoffice-style-breeze libreoffice-style-galaxy python3-uno
0 upgraded, 6 newly installed, 0 to remove and 0 not upgraded.
Need to get 471 kB/54.1 MB of archives.
After this operation, 215 MB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Err http://ubuntu.01link.hk/ wily-security/universe libreoffice-style-breeze all 1:5.0.5~rc2-0ubuntu2
  404  Not Found
Err http://ubuntu.01link.hk/ wily-security/universe libreoffice-kde amd64 1:5.0.5~rc2-0ubuntu2
  404  Not Found
E: Failed to fetch http://ubuntu.01link.hk/pool/universe/libr/libreoffice/libreoffice-style-breeze_5.0.5~rc2-0ubuntu2_all.deb  404  Not Found

E: Failed to fetch http://ubuntu.01link.hk/pool/universe/libr/libreoffice/libreoffice-kde_5.0.5~rc2-0ubuntu2_amd64.deb  404  Not Found

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