I have not connect ec2 instance by instance and ssh key

Question

I  have   changed   instance  type  .  Afteward  I can't  connect  my  new  instance by instance  and ssh .  I have  created  new  key pairs   but  it did  not  help me.  If  connect  by instance . I have occured  by this error ."There was a problem connecting to your instance
Log in failed. If this instance has just started up, wait a few minutes and try again. Otherwise, ensure the instance is running on an AMI that supports EC2 Instance Connect."

Answer

Hello, 
When changing instance type the instance has to be stopped and then started, which means that the public IP might have changed.

Is it EIP that you are using?

Thank you!

I have not connect ec2 instance by instance and ssh key

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