I was attempting to add a addon domain, but I get this message when ever I try to add one:

"The directory, /home/******/public_html/******.pcriot.com could not be created."

I also tried deleting the "Index.html" and replacing it with a "Index.php" but when I try that I get a message saying:

"ERROR: Could not create file "index.php" in /home/******/public_html: Read-only file system"

Could someone assist me please?