This Morning, Monorail Purple, when leaving the Monorail Barn, had an "incident" with the Door to the barn. (aka Oops, I hit the door
Therefore currently only Monorail Red is running on the track, and is making round trips about every 15 minutes.
Expect the DtD Monorail station to be restricted in the morning to only Disney Hotel Guests. But that the Monorail should be open to all for the late morning, afternoon period, but with a wait.
Hopefully the Disneyland Maintenance crew can get Purple back to being allowed to run in the next few days.
You might think about walking instead of riding if you are showing up in the next few days...