Hi Paul,
Assuming you have got your AWS Access Keys from: https://portal.aws.amazon.com/gp/aws/securityCredentials.
In WordPress navigate to the Settings
> Amazon Link page
. (wp-admin/options-general.php?page=amazon-link-options).
There should be a number of windows, one of which is ‘Options
‘, towards the bottom of this window there is a subsection ‘Amazon Associate Information
‘. There are two settings:
AWS Public Key
and AWS Private Key
put your AWS Access Key ID and Secret Access Key in here an select Update. Once this is done the setting ‘AWS Keys Validated’ should be ticked.
Hope this helps!
Paul