linux – SSH public key denied Kali Nethunter

am not able to ssh to Amazon AWS from my kali nethunter device nexus 6p I get this error public key denied.

However I can easily ssh from my desktop without any issues, computer that has kali linux directly installed.

Here is the error.

──(root💀kali)-(/sdcard/Download)
└─# ssh -i kali-cloud.pem ec2user@ec2-x-x-x-x.us-east-2.compute.amazonaws.com
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@
@ WARNING: UNPROTECTED PRIVATE KEY FILE! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@
Permissions 0660 for ‘kali-cloud.pem’ are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
Load key “kali-cloud.pem”: bad permissions
ec2user@ec2-x-x -x.us-east-2.compute.amazonaws.com: Permission denied (publickey).

Kindly suggest.

Regards
Skorp