[ROOTS-LN] User permissions to view initiator/moderator Nuggets

[janeklqd]

URL:
user: regular user and guest user
expected behaviour: they can view the content of any nugget
behaviour: they get an error message when attempting to view nuggets that have the permission set to "initiator" or "moderator" in wagtail
important screensize:
device & browser:
Comment/Question:

Screenshot?