Cloning error. Repository not found.

[ik9999]

git clone --recursive -j8 https://github.com/manuels/unix-toolbox.js-imagemagick
Cloning into 'unix-toolbox.js-imagemagick'...
remote: Counting objects: 2873, done.
remote: Total 2873 (delta 0), reused 0 (delta 0), pack-reused 2873
Receiving objects: 100% (2873/2873), 103.22 MiB | 737.00 KiB/s, done.
Resolving deltas: 100% (1517/1517), done.
Submodule 'libjpeg' (git://github.com/manuels/unix-toolbox.js-libjpeg.git) registered for path 'libjpeg'
Submodule 'libpng' (git://github.com/manuels/unix-toolbox.js-libpng.git) registered for path 'libpng'
Submodule 'libtiff' (git://github.com/manuels/unix-toolbox.js-libtiff.git) registered for path 'libtiff'
Submodule 'toolbox-base' (git://github.com/manuels/unix-toolbox.js-base.git) registered for path 'toolbox-base'
Submodule 'zlib' (git://github.com/manuels/unix-toolbox.js-zlib.git) registered for path 'zlib'
Cloning into '/var/www/hicham/leggings_gen/demo/unix-toolbox.js-imagemagick/libjpeg'...
remote: Counting objects: 385, done.
remote: Total 385 (delta 0), reused 0 (delta 0), pack-reused 385
Receiving objects: 100% (385/385), 2.92 MiB | 712.00 KiB/s, done.
Resolving deltas: 100% (155/155), done.
Cloning into '/var/www/hicham/leggings_gen/demo/unix-toolbox.js-imagemagick/toolbox-base'...
remote: Counting objects: 63, done.
remote: Total 63 (delta 0), reused 0 (delta 0), pack-reused 63
Receiving objects: 100% (63/63), 9.54 KiB | 9.54 MiB/s, done.
Resolving deltas: 100% (19/19), done.
Cloning into '/var/www/hicham/leggings_gen/demo/unix-toolbox.js-imagemagick/zlib'...
remote: Counting objects: 288, done.
remote: Total 288 (delta 0), reused 0 (delta 0), pack-reused 288
Receiving objects: 100% (288/288), 1.03 MiB | 449.00 KiB/s, done.
Resolving deltas: 100% (33/33), done.
Cloning into '/var/www/hicham/leggings_gen/demo/unix-toolbox.js-imagemagick/libpng'...
remote: Counting objects: 324, done.
remote: Total 324 (delta 0), reused 0 (delta 0), pack-reused 324
Receiving objects: 100% (324/324), 1.79 MiB | 516.00 KiB/s, done.
Resolving deltas: 100% (77/77), done.
Cloning into '/var/www/hicham/leggings_gen/demo/unix-toolbox.js-imagemagick/libtiff'...
remote: Counting objects: 903, done.
remote: Total 903 (delta 0), reused 0 (delta 0), pack-reused 903
Receiving objects: 100% (903/903), 13.23 MiB | 717.00 KiB/s, done.
Resolving deltas: 100% (418/418), done.
Submodule path 'libjpeg': checked out 'c2018e5eb49f2f29a3c0a1274dca35f3d25aaece'
Submodule path 'libpng': checked out '515afd87f0c0da7b9318ff8594f46a0142eef969'
Submodule path 'libtiff': checked out 'cb2980bbddb6c64462ea1d78563a0bd0c9def058'
Submodule 'zlib' (git://github.com/manuels/zlib) registered for path 'libtiff/zlib'
Cloning into '/var/www/hicham/leggings_gen/demo/unix-toolbox.js-imagemagick/libtiff/zlib'...
fatal: remote error:
Repository not found.
fatal: clone of 'git://github.com/manuels/zlib' into submodule path '/var/www/hicham/leggings_gen/demo/unix-toolbox.js-imagemagick/libtiff/zlib' failed
Failed to clone 'zlib'. Retry scheduled
Cloning into '/var/www/hicham/leggings_gen/demo/unix-toolbox.js-imagemagick/libtiff/zlib'...
fatal: remote error:
Repository not found.
fatal: clone of 'git://github.com/manuels/zlib' into submodule path '/var/www/hicham/leggings_gen/demo/unix-toolbox.js-imagemagick/libtiff/zlib' failed
Failed to clone 'zlib' a second time, aborting
Submodule path 'toolbox-base': checked out '618090fbbb10622fcffae2dfbfc5ce310759f14a'
Submodule path 'zlib': checked out '9ccb75e773cb333c4627b7d5c85c8b94d17058d8'
Failed to recurse into submodule path 'libtiff'