3648780 - Error when accessing 'Config' button in Subscription Contract

Some users encountered the following error when accessing the 'Config' button in the item level of the 'Manage Subscription Contracts' Fiori APP.

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App could not be opened either due to an incorrect SAP Fiori launchpad configuration or a missing role assignment.

Failed to resolve navigation target '#VariantConfiguration-configureLegacy?
draftKey=<numbers omitted>&embeddedInWebGUI=true&id=C&&_W&&_V&&_AVC&objectKey=BUS2000<omitted>&semanticObject=CRMOrder&uiMode=Display'. 

This is most likely caused by an incorrect SAP Fiori launchpad content configuration or by a missing role assignment.
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Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.

• SAP S/4HANA

config button error, manage subscription contracts app, SAP Fiori launchpad configuration, missing role assignment, VariantConfiguration-configureLegacy, navigation target error, SAP_BR_PURCHASER role, subscription order management, S4CRM , KBA , CRM-S4-BF-CFG , S4CRM: Product Configuration , CRM-S4-SOM , S4CRM: Subscription Order Management , LO-VCH , Advanced Variant Configuration , LO-VC , Variant Configuration , Problem