Hello everyone,
This is your daily dose of issue.
As we can not use a command group to order a report made with business reporter, I chosen to perform the business report generation through API rest calls on a webapp.
The business report requires shop order no, release no and sequence no parameters.
I went on the order report page to simulate the calls made and replicate those on my webapp.
I use an IAM client with this configuration :

When I use Postman with this account, no issue, the report is created and filled with data.
When I use my webapp with the same account, I have no issue with rest calls (HTTP 2xx) , recovering data in responses to build next calls, everything look fine.
But when I download the report, this one has the same structure, but data is empty, cells are not filled.
Here is PHP source code of prototype :
https://pastebin.com/bUf4XuMt