Assign SSM Role

When the instance has been launched you will need to assign the role created in previous step

a) Go to the EC2 instance panel and choose your instance:

b) Go to Actions->Security->Modify IAM Role

If you are using the new EC2 Dashboard the menus will look like this instead:

c) Choose the IAM Role created in previous step and attach it to the instance (do not forget to "refresh" the table):

Save to complete the configuration.

For the instance to be able to use the new role you will need to reboot the instance: