Description of problem:
In Safari 15.x on macOS, the Devfiles samples can't be loaded from the backend. As viewed in the network inspector of the browser I can say that the app makes two calls to the backend. The first answer was a redirect, the second the failure. Unfortunately, the payload gets lost between the first and second call.

Version-Release number of selected component (if applicable):
4.9

How reproducible:
Always

Steps to Reproduce:
1. Switch to dev console
2. Create a new project
3. Click on "+Add" or "View all samples"

Actual results:
See network error in the browser network tab, no samples and no error is displayed on the view.

Expected results:
No network error, samples should be correctly displayed.


Additional info:
Cross-tested between different Safari Versions. In Safari 14.x this issue does not appear.