Error:
Not Found
The requested URL /tdf/libreoffice/stable/6.2.6/win/x86_64/LibreOffice_6.2.6_Win_x64.msi was not found on this server.
You need to provide the whole failing address. It is likely some single mirror among those listed at https://download.documentfoundation.org/libreoffice/stable/6.2.6/win/x86_64/LibreOffice_6.2.6_Win_x64.msi.mirrorlist - which is the one that is found to be closest to you?
In the meanwhile, found http://mirror.rise.ph/tdf/libreoffice/stable/6.2.6/win/x86_64/LibreOffice_6.2.6_Win_x64.msi to be 404; notified infra team.