When you get errors like that about temporary asp.net files, the only solution I know is stop the web site in IIS and delete the temporary files, then start the web site again and they will get re-generated by the asp.net compiler.
Specifically you need to delete the folder
c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\183a058a\11b05bf2\
but you cannot delete it without first stopping the IIS web site, otherwise it won't let you delete them
you will probably need your host to do this for you