Cannot update submodules.

using git submodule update --init --recursive doesnt really work, it will stay freezing with only making rhe folders of the submodules on. do i just go and clone them manually?
Here's the log:
Notice that I cloned them on my device internally to run it, not fork it.

$ git submodule update --init --recursive
Cloning into '/cpr-example/opt/json'...
warning: Cannot protect .git/config on this file system - do not store sensitive information here.

It stops there.