OpenWrt Metarouter Update Fail

RouterOS Virtualization
1

Hi
I download Metarouter image for MIPS from Mikrotik wiki and @liquidcz’s post
But when I try to update or install a package I get a 404 error
(for liquidcz’s image update address is for x-wrt.org but still not found)

and I check the address by browser :

I chech the https://downloads.openwrt.org/snapshots/trunk/ and cant find “mr-mips” in trunk:

Now
the question is

  1. How to update metarouter?
  2. How to install packages manually if opkg auto download and install is not available?