Submodule failed to init - 'rust_raytrace/rust-raytracer-weekend'

[Tresvian]

>> git submodule
 0bd94b14f8b6b838bbd48e5c204e819df621e659 linux (v5.17-2542-g0bd94b14f8b6)
 44818d1a35315c4dde34050eb0aac98866f9eb15 mprv/micropython (v1.16-222-g44818d1a3)
 7aa6c9aa96049b741b754b7340ea96a37719de27 opensbi (v0.9-134-g7aa6c9a)
 7d1a0e3153c37cd180be9e95f331f32c225d9257 riscv-opcodes (remotes/origin/riscv-bitmanip-33-g7d1a0e3)
 8ee69d7a5dc7ef6d8b2bda96bf86d2923f2cf176 riscv-rust (0.2.2-70-g8ee69d7)
 1b2c3ea84a7f8d8a833fca4d2b9aebb7d1ba4269 riscv-tests (remotes/origin/hw_watchpoint-128-g1b2c3ea)
 85e04d1edb1e35d2e59a791f5246dfec33982305 riscv32_belugafatal: no submodule mapping found in .gitmodules for path 'rust_raytrace/rust-raytracer-weekend'
 (heads/master)

A submodule failed to recursive clone and also fails on recursive initialization. Is the submodule the repo below?:

https://github.com/mwcz/rust-raytracer-weekend