no matched libc, please add more libc or try other

[Byzero512]

Type "help", "copyright", "credits" or "license" for more information.

from LibcSearcher import *
obj = LibcSearcher("fgets", 0X7ff39014bd90)
obj.dump("system")
No matched libc, please add more libc or try others

---

git submodule update --init --recursive

fatal: reference is not a tree: 4ebb57bbda779f5979347934e52e7ca27bc9153f
Unable to checkout '4ebb57bbda779f5979347934e52e7ca27bc9153f' in submodule path 'libc-database'

[JD1412]

执行完‘./get’之后报错，No matched libc, please add more libc or try others这个怎么处理？
还有做个合格问题怎么解决：
root@kali:~/Desktop/ret2syscall/libc# git submodule update --init --recursive
Submodule 'libc-database' (https://github.com/lieanu/libc-database.git) registered for path 'libc-database'
Cloning into '/root/Desktop/ret2syscall/libc/libc-database'...
error: Server does not allow request for unadvertised object 4ebb57bbda779f5979347934e52e7ca27bc9153f
Fetched in submodule path 'libc-database', but it did not contain 4ebb57bbda779f5979347934e52e7ca27bc9153f. Direct fetching of that commit failed.

[pcy190]

I was faced with this problem too.However,I have saw some articles use this module and they successfully use this module.I wonder whether this module is availble some time before.