Mux API error, can't upload videos to Mux. (Or Mux is unable to download video from R2)

[dgagnon-rdx]

Describe the bug
Unable to use Mux for video. Mux thrown an error about being unable to download the file.

To Reproduce
Steps to reproduce the behavior:

1. Configure MC for using R2
2. Configure MC for using Mux
3. Upload a video by using wordpress media library
4. Go to your mux account and check the assets uploded, there is nothing there.
5. Check the API log and there is two kind of issues:
6. If the integration to mux is automatic, you'll see an error about being unable to download the file. The URL is good which is the one from cloudflare R2.
7. If you use the task "Transfer Mux Videos" for Cloud Tasks, the same error on Mux api appears but this time, the URL is wrong, containing only https://hostname.domaine.com/

Expected behavior
Should be able to rtreive the file from R2. Maybe the file isn't ready when MC ask Mux to get the file?

Screenshots

Server (please complete the following information)

• Operating System Ubuntu 22.04.2 LTS
• PHP Version: 8.1
• Web Server: nginx
• Using PHP-FPM? Yes
• Using WordPress Cron? Yes

How did you install the plugin?
Manual from freemius

Additional context
Add any other context about the problem here.