Why doesn't BitBucket add the id_rsa.pub key created in AWS Cloud9?

Question

SSH

1. Created an environment in AWS Cloud9.
2. I create an ssh key according to the bitbucket instructions .
3. The key has been created.
4. Next CTRL-C CTRL-V.
5. A message appears: "This access key is not valid".
What needs to be done to add the key.

Answer 1

rsa are different) and therefore does not fit, well, or not everything is copied

Answer 2

Is it okay that on the screenshot of the terminal the key starts with AAAA, and on the screenshot of the bitbucket - GPw8? Is the key exactly the same on both screens?