Just an FYI for people that have been seeing this error, but no matter what you try can't work it out.
First of all, yes this is a permissions error, however if you, like me, concentrated on checking if your shared folder permissions were correct, but then forgot to check if each separate folder in that shared folder have the correct permissions.
Anyways, before you try everything like uninstalling, installing etc, check your specific folder permissions for TV Shows and Movies by right clicking and opening 'Properties'. Change owner to 'admin' and select apply to this folder, sub-folders and files under Owner and Group.
Hope this helps someone else