Are the associations correctly set between details and notification? and are the access rules for details and their associations also set to Read?
or is it only after a refresh by the microflow timer and not when the page is initially loaded?
Can you confirm the security, Access roles of the Notification entity are mapped to the access roles of the layout you used to display the list .
The Same error happens to me , I have mapped the roles of Entity module to the roles of layout in Project Security settings .
if you are using any Data Source microflow for Listview , Check the roles mapped there.
Isn't the microflow timer being executed in the system context? When you debug the microflow, is an object of type account available at all? If not, perhaps the access constraint might be the issue?