Hello @tristan083
Thank you for your reply here.
We have tried 2 different Paypal account and getting the same result in both the cases.
Here I have recorded a video while connecting a new sandbox account, https://capture.dropbox.com/CiAkryRfdqEGjhvx
Please review the video and let me know if we are doing anything wrong. The green line you have shown in your comment is not being reflected on my end.