A user says they cannot see the Fundraising objects even though you assigned them a permission set. How do you troubleshoot?

I work from licensing outward, because that is the most common cause on Industries products and the least familiar to admins coming from core Salesforce.

1. First, permission set licenses. A permission set can only grant what the assigned licences permit, so a missing PSL produces exactly this symptom — an assigned permission set that appears to do nothing.
2. Then the permission set contents themselves: object permissions, field-level security, and tab visibility, which is a separate setting people forget.
3. Then app and navigation: the user may have access but not the Lightning app, so the objects are reachable but invisible.
4. Then record-level access — they can see the object but no records, which users describe identically to “I cannot see it”.
5. What I would not do is escalate the profile. Granting System Administrator to resolve a licensing gap is both the wrong fix and a real security problem, and it tends to become permanent.