Make package/download: build failed

I am trying to build an image for a Turris Omnia for the first time (19.07), and make download is not cooperating with me.

It first tries to run this command:

curl -f --connect-timeout 20 --retry 5 --location --insecure https://www.candelatech.com/downloads/firmware-2-ct-full-community-22.bin.lede.008

and fails with curl: (7) Failed to connect to www.candelatech.com port 443: Connection refused about 20 seconds later (could be some transient errors on my end): Warning: Transient problem: timeout Will retry in 1 seconds. 5 retries left. This command succeeds when I run it myself from the terminal, so I will deal with that later.

Then the build attempts to download this same file from three locations:

https://sources.lede-project.org/firmware-2-ct-full-community-22.bin.lede.008
https://mirror2.openwrt.org/sources/firmware-2-ct-full-community-22.bin.lede.008
https://downloads.openwrt.org/sources/firmware-2-ct-full-community-22.bin.lede.008

and each is getting curl: (22) The requested URL returned error: 404 Not Found: I checked and those files do not exist there: I think the files in those three locations are prefixed with QCA988X-.

Is there a link missing on the hosting server or this is a build issue?

These are the only files available that match firmware-2-ct-full-community-, so 22.bin is indeed missing.

firmware-2-ct-full-community-16.1.bin-lede
firmware-2-ct-full-community-16.bin-lede
firmware-2-ct-full-community.bin-18.rc1-lede
firmware-2-ct-full-community.bin-18.rc2-lede