Blender Version
Broken: 2.83 and above
Worked: 2.82

Short description of error
In the Python API docs, bpy.types.WindowManager.clipboard has disappeared in release 2.83. It is not removed, it can still be used but the documentation is gone.

Here's 2.82 docs: https://docs.blender.org/api/2.82/bpy.types.WindowManager.html#bpy.types.WindowManager.clipboard

Disappeared in 2.83 docs: https://docs.blender.org/api/2.83/bpy.types.WindowManager.html

It's missing in every documentation from version 2.83 to the latest version.