I am currently aware of an issue causing intermittent 403.6 errors to be displayed when trying to reach this site. The error indicates “The IP address from which you are browsing is not permitted to access the requested Web site” but despite the indication in that error, this is not a case of your specific IP address being blocked.
The hosting company is experiencing some server-side issues that are causing this error to be displayed and their engineers are working on a long-term permanent fix to the problem.
I apologize for the inconvenience this issue has caused. If you receive this error, wait a few moments and try again.