Swagger - swaggerDetailed.json returns Not Found

I’m using Studio 6.9.0 … Looked at release notes for 6.0.1 and didn’t see a related update.

Reading this: https://youtrack.cuba-platform.com/issue/PL-9387
And this: https://doc.cuba-platform.com/manual-latest/rest_swagger.html

Doing This: http://localhost:8080/app/rest/v2/docs/swaggerDetailed.json

I get a 404 Not Found.

When I do just this: http://localhost:8080/app/rest/v2/docs/swagger.json
Works …

What am I doing wrong on the swaggerDetailed.json ?

Solved. Yes, my Studio is version 6.9.0
But the project is a demo - sample sales. And this project was created with a previous version.
Upgraded the Project to 6.9.1 by going to Project Properties | Edit | Platform Version. Save

Works !