Outlook online add-in, can't login

I have the Asana Add-in for Outlook Online/Web version. The icon shows up for me to add tasks, but I am unable to login to the add-in when prompted in Safari. I am already logged in to Asana in Safari, but when I try to log-in to the Add-In in outlook a pop-up page shows, asks me to log-in, then closes and I am not logged in.

Fix for this?

Safari Version: Version 14.0.1 (16610.
Mac OS: Big Sur version 11.0.1 (20B29) - same issue happened before updating to Big Sur

Thanks for reaching out @Josh_Brown! Let’s try to solve this together!

Do you mind try to uninstall and reinstall the add-on? Most of the time, reinstalling add-ons fixes this type of issue.

Can you also confirm that you’re not already logged into another Outlook account on your browser?

I look forward to your reply!