https://userapps.support.sap.com/sap/support/knowledge/en/3020919
3020919 - UIGRAC01 Addon availability for S/4HANA 2020 and S/4HANA 2021 | SAP Knowledge Base Article
You have recently upgraded your system to S/4HANA 2020/2021 and you see that there are no import conditions available to install UIGRAC01 100 in a system...