403 error in Wordpress 4.0 options.php
I went ahead and contacted namecheap directly and they corrected it quickly - I don't think there's anything you can do. Specifically, they said:
We have whitelisted Mod Security rule which has been triggered. Please try preform necessary actions one more time.
Hope that helps.
Check your Privileges of wordpress database users.Check also file & folder permission.( a folder permission 755 and file permission 644 )