If after installation, a user is having trouble accessing Pulsar licensed features, you can check if their profile is set up properly to access the Pulsar Settings package.
1. Click on Set Up
-> Installed Packages
-> Pulsar Settings
-> View Components
-> licenseRest
-> Security
-> Make sure the profile this user belongs to has permission on this class.
2. Click on Manage Users
-> Profiles
-> Select the profile of the user who is having the issues
-> Make sure they have read permission on Pulsar Settings custom object
-> After that look under ‘Field Level Security’
-> Click on Pulsar Settings
-> Make sure they can read Key, Value and Priority fields.