`error: Load key "id_ed25519": error in libcrypto` when git clone with ssh / flake input with ssh

[amalgame21]

I want to access my private repo as flake input.
This is my setup:
I have an forgejo instance
Say the IP is 192.168.1.2, an account named git and a repo something.
The public key ~/.ssh/id_ed25519.pub is properly added into the forgejo instance via web UI for access of all the repo under account git using ssh.

I input this in ~/.ssh/config

Host forgejo
    HostName 192.168.1.2
    IdentityFile ~/.ssh/id_ed25519
    Port 22
    User forgejo

I put this in flake.nix:

inputs.something.url = "git+ssh://forgejo/git/something";

It shows the error error: Load key "id_ed25519": error in libcrypto when I run nix-on-droid switch --flake /path/to/flake
Same when I run git clone "ssh://forgejo/git/something"

I have no issue with this setup on my other NixOS machine.

It only affect git, ssh remote shell access to other machine is fine.

How can I debug this? thansk.

[amalgame21]

I put the public key to IdentityFile in ~/.ssh/config, should be private key.