You’ve most probably exceeded your keywords allowance. You can either delete some keywords or upgrade.
Each plan is set up to track a different amount of keywords.
Starter plan: track up to 100 keywords
Pro plan: track 300 keywords
Guru plan: track 1000 keywords
Enterprise plan: track 2000 keywords.
You can delete some keywords at any time by going to "My Account > Plan Usage". Click on the eye symbol and chose which keywords you want to delete from your tracked keywords. You can also delete keywords one by one by going directly in your Keywords Analysis table on the Keyword tool (on the app of your choice).
Note: if you track same keyword in two different stores, countries or languages, it counts as two keywords.
If you need more keywords, we can create a custom plan just for you! Feel free to reach out at firstname.lastname@example.org.