Media Player Entities Empty in Blueprint

[greddy91]

Apologies for the trouble. I'm a rookie in HA and MA use; this install is a week old and is HA installed on Qnap.

I'm trying to configure the MA Jukebox but regardless of what I do, when I get to the automation creation blueprint there are no Media Player entities to select from in the drop down. I'm sure I'm missing something simple in this, but for the life of me I can't figure out what switch to flip.

Thanks in advance for any help you might provide.