POA-91555 Changing APS.NET support to 4.5 for IIS8 result to 'No Managed Code' for the webspace application pool
Hotfix can be downloaded here
Use pa_updates_installer (http://kb.sp.parallels.com/en/111323
) to install this hotfix. Also this hotfix will be installed automatically during upgrade to POA 6.0.1 via pa_updates_installer. To install hotfix manually obtain its distributive from the link above and follow instructions found in file UPDATE.txt of distributive.