Reproduction steps:
1. Open the attached “BugRepro” project
2. Observe the Console

Expected result: No errors are logged
Actual result: “error CS0118: 'Editor' is a namespace but is used like a type” error is logged

Reproducible with: 6.0.2 (6000.0.16f1)
Not reproducible with: 5.2.3 (2021.4.43f1, 2022.3.43f1), 6.0.1 (6000.0.16f1)

Reproducible on: Windows 11
Not reproducible on: No other environments tested

Note: Removing or downgrading Probuilder package resolves the issue