ronniegregorym on "[Plugin: WordPress MU Domain Mapping] You do not have parmission to preview drafts"

Hi I love your plugin thanks.
I am having an issue though. I have mapped 2 domains to 2 sub domains and used those domains as primary domains. Everything works perfectly except for the fact that I cant preview any drafts or published pages after edit. I get the error "You do not have permission to preview drafts" now this only happens with the mapped domains and not the main site as well as the other unmapped domains.
I really need this plugin and don't want to uninstall it.
Any help with this would be appreciated
Thanks

https://wordpress.org/plugins/wordpress-mu-domain-mapping/