I apologize for the misunderstanding. We realized it was due to an incorrect server configuration causing well-known bots to be blocked from performing basic requests.
It is working for us now. Thank you for sharing the tool, as it was able to help us better understand the issue.
If it helps, the issue only seems to arise when I am already signed in and it does not prompt me to log in. Please let me know if you are able to replicate this.