Autoinvoice errors with "You must enter a valid context for the CONTRACT INVOICES flexfield"

Summary:

When running Import Autoinvoice for invoices from Project Contracts, the process always fails with 'You must enter a valid context for the CONTRACT INVOICES flexfield'.

After going through few notes, Contract Invoice DFF has been enabled for Line Transaction (see screenshots) but the process still fails (see attached log).

Has anyone faced this issue and what is the solution?

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):