Country & tax category & are not allowed for sales organization &

What causes this issue?

Purely batch input error message: A country and tax category
combination which is not defined was transferred.

How to fix this error?

Exactly those indicators for the following country/tax category
combinations may/must be maintained or transferred:
1. Sales organization company code country
2. Sales organization plant countries
3. All tax categories allowed for the countries from 1 + 2 (within
customizing, select Sales and Distribution -> Basic functions -> Tax
determination -> Define tax determination rules and then from here
select Tax categories per country.

Error message extract from SAP system. Copyright SAP SE.