Arduino-dock building error

user_xyz@develop_machine:~/dev/project_xyz/openwrt$ make package/arduino-dock/configure -j1 V=s
make[1]: Entering directory '/home/user_xyz/dev/project_xyz/openwrt'
make[2]: Entering directory '/home/user_xyz/dev/project_xyz/openwrt/feeds/onion/arduino-dock'
mkdir -p /home/user_xyz/dev/project_xyz/openwrt/dl
SHELL= flock /home/user_xyz/dev/project_xyz/openwrt/tmp/.arduino-dock.tar.gz.flock -c '	 echo "Checking out files from the git repository..."; mkdir -p /home/user_xyz/dev/project_xyz/openwrt/tmp/dl && cd /home/user_xyz/dev/project_xyz/openwrt/tmp/dl && rm -rf arduino-dock && [ \! -d arduino-dock ] && git clone git@github.com:OnionIoT/arduino-dock.git arduino-dock --recursive && (cd arduino-dock && git checkout HEAD && git submodule update) && echo "Packing checkout..." && rm -rf arduino-dock/.git && 	tar czf /home/user_xyz/dev/project_xyz/openwrt/tmp/dl/arduino-dock.tar.gz arduino-dock && mv /home/user_xyz/dev/project_xyz/openwrt/tmp/dl/arduino-dock.tar.gz /home/user_xyz/dev/project_xyz/openwrt/dl/ && rm -rf arduino-dock; '
Checking out files from the git repository...
Cloning into 'arduino-dock'...
ERROR: Repository not found.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
Makefile:61: recipe for target '/home/user_xyz/dev/project_xyz/openwrt/dl/arduino-dock.tar.gz' failed
make[2]: *** [/home/user_xyz/dev/project_xyz/openwrt/dl/arduino-dock.tar.gz] Error 128
make[2]: Leaving directory '/home/user_xyz/dev/project_xyz/openwrt/feeds/onion/arduino-dock'
package/Makefile:192: recipe for target 'package/feeds/onion/arduino-dock/configure' failed
make[1]: *** [package/feeds/onion/arduino-dock/configure] Error 2
make[1]: Leaving directory '/home/user_xyz/dev/project_xyz/openwrt'
/home/user_xyz/dev/project_xyz/openwrt/include/toplevel.mk:192: set di istruzioni per l'obiettivo "package/arduino-dock/configure" non riuscito
make: *** [package/arduino-dock/configure] Errore 2