Problems editing archive pages with Audiotheme Promenade

I am using Audiotheme’s Promenade for my artist website, and just noticed that I am unable to edit any of the “archive” pages on my site. When I click on “archive” under Gigs, Videos or Discography, an error page appears stating: “You are not allowed to edit posts in this post type.”

Does anyone have any solutions to this??

Many thanks!