Modal and popup windows are not compatible

While creating my first project using this UI, I noticed that windows using the modal bool and windows using the popup bool seem mutually exclusive. While i would like to use both.

My modal is for inputting the name of a new playlist, while the popup should function as a toast to tell the user a playlist with that name already exists.

When opening a popup window while a modal window is opened, the popup does not appear.

If possible, would it be possible to make it so I can open a popup window over a modal window? Or if a work around for this issue exists.

Thank you in advance!