As the error message said, Access is denied. It means that the user account under which asp.net is running is trying to access resource without having sufficient permissions on that resource.
1. Login to your Virtual Machine using Remote Desktop ( mstsc )
2. Go to “C:\plesk\etc\DiskSecurity” folder
3. Edit disksecurity.xml file. Add following entry at the end ( before </Entries> )
<Entry AccounType="1" Account="Psacln" Path="C:\Windows\assembly" AceFlags="FilesOnly" AccessMask="Read" EntryFlags="0x0" />
And you are done… Enjoy…