No worries, I have re-entered the affiliate IDs and now all works. Just for your info:
- I have checked my clicks on Affiliate Window and they stopped working on Tuesday I believe.
- Recently I have done this that follows:
1. Upgraded to the new Yoast SEO Plugin
2. Included Skimlinks Plugin
3. Introduced the Zanox API
4. Introduced the Amazon API
And I thing that is all I can remember that could have affected this.
Thank you for everything