Hi,

I have a question about the mentioned behaviour.
I got the same error (on 18.06.8 and now on 19.07.3):

Downloading http://downloads.openwrt.org/releases/19.07.3/targets/ar71xx/nand/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_core
Downloading http://downloads.openwrt.org/releases/19.07.3/targets/ar71xx/nand/packages/Packages.sig
Signature check passed.
Downloading http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/base/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_base
Downloading http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/base/Packages.sig
Signature check passed.
Downloading http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/libremap/Packages.gz
*** Failed to download the package list from http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/libremap/Packages.gz

Downloading http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/libremesh/Packages.gz
*** Failed to download the package list from http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/libremesh/Packages.gz

Downloading http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/luci/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_luci
Downloading http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/luci/Packages.sig
Signature check passed.
Downloading http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_packages
Downloading http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/packages/Packages.sig
Signature check passed.
Downloading http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/routing/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_routing
Downloading http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/routing/Packages.sig
Signature check passed.
Downloading http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/telephony/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_telephony
Downloading http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/telephony/Packages.sig
Signature check passed.
Downloading http://snapshots.libremesh.org/packages/mips_24kc/libremesh/Packages.gz
*** Failed to download the package list from http://snapshots.libremesh.org/packages/mips_24kc/libremesh/Packages.gz

Collected errors:
 * opkg_download: Failed to download http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/libremap/Packages.gz, wget returned 8.
 * opkg_download: Failed to download http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/libremesh/Packages.gz, wget returned 8.
 * opkg_download: Failed to download http://snapshots.libremesh.org/packages/mips_24kc/libremesh/Packages.gz, wget returned 4.
 * opkg_download: Check your network settings and connectivity.

So I checked - and there are no libremesh/map packages or directories on the openwrt.org release Servers. So why are there those opkg lists? 
Because there are no binary releases?

Thanks for a hint ;-)

Cheers,
Andy