Hello! I'm missing the Custom Columns option for the People Performance report under Marketo Analytics. It should be showing to the right but it's just showing a Search... option. Is this a bug?
That is most likely because you do not have rights to access any of the Marketo sections that can have the smart-lists (Marketing Activities and Database) and as you would know custom columns are added via the smart lists. This is the expected system behavior in-case of missing rights/permissions.