Server refused our key -EC2 instance issue

Reason: This can occur when your key pair is not converted properly or used the wrong key pair. If you enter the username wrong then also this error will occur.

Solution: First, load the key pair then directly click on save private key and use that key in launching the instance. Use the username according to the AMI.

Amazon Linux: ec2-user

Ubuntu: ubuntu

How do I fix server refused our key aws?

To solve the "server refused our key" error, you can do the following steps: Open PuTTYgen, Go to File > Load Private key and open your Private Key File. Highlight the Public key that was created in the text box and copy it to the clipboard. Open the authorized_keys file and paste the public key.