Sorry for your Message, We think that you are not able to use it properly or do not know how to use it. Well, we wrote an article/guide about it and explained how to use this. You can find that at https://www.exeideas.com/2020/03/wp-autokeyword-wordpress-plugin.html
As per your message, we think that you forget to generate/save your keyword library and start running this tool on your whole blog. Please reach us if you are having trouble while using it.
In short, We just tested before replying that it is working and uptodate.