Sorry, but I cannot reproduce the problem. I still say the error message is indicative of a file system permission problem
if the file exists C:\Inetpub\wwwroot\mojoportal\Data\Sites\1\systemfiles\themecachedependecy.config
delete it
if it does not exist then the folder is not writable by the web process
if it does not come back after deleting it then the folder is not writable by the web process
Hope it helps,
Joe