Unable to update lists for selected subscribers

[Mattifyed]

Description of the bug and steps to reproduce:
I tried removing some subscribers from one of my lists today from /admin/subscribers/lists/{{list_id}}. To do this, I navigated to the list view showing the subscribers of a particular list from /admin/lists, selected all the subscribers from the list using the bulk selection checkbox, clicked on the "Manage lists" option, and removed the subscribers from one of the lists they're on.

However, when I hit save, I saw a toast with an error, as shown below.

This only happens when I use the "Select all n" tool. If I simply select the 30 entries, I see on the page, the action goes through without error.