Fatal error: Call to undefined method aaAmazonWS::set_the_plugin() line 88 (ANSWER/SOLVED)

Fatal error: Call to undefined method aaAmazonWS::set_the_plugin() line 88

I was installing WooZone's  WooCommerce Amazon Affiliates plugin. And I received the message above.

Essentially, I had already installed WooCommerce Light. Then, I tried to install the purchased version above. When I installed it, the message appeared.

Solution:

1. go to WooCommerce Light
2. Get your Amazon WS settings if you don't have them easily available
3. Deactivate the Light version
4. Activate the new version

This will allow you to continue..

No more

Fatal error: Call to undefined method aaAmazonWS::set_the_plugin() line 88