403 Forbidden when editing pages randomly.

The website I am working on is [www.roadhouseproduction.com]) and I keep getting this error:

“Forbidden

You don’t have permission to access this resource.

Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request.”

I am using a theme called ‘Kingcomposer Mixone’

Any help would be appreciated. I googled it but it is very confusing.

 

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