DotNetPanel (Hexadecimal value 0x13, is an invalid character)
The error "hexadecimal value 0x13, is an invalid character" commonly occurs in DotNetPanel with Windows Server 2008 accounts when the web.config has been modified incorrectly or completely replaced. IIS7 uses the web.config to store all of it's settings and any incorrect modifications or complete replacement to this file will cause the control panel to function inproperly.
To resolve this error please follow the steps below:
1. Remove the web.config file from within the File Manager.
2. Delete the web site from within DotNetPanel. (Deleting the domain does not remove files associated with it).
3. Re-add the web site.