Need a plugin to show a page or post content in widget

I there a plugin that allows me to put the exact content I have in a page or post in a widget? + be able to hide this from being displayed anywhere else

I thought I found the answer: Yank Widget – its description is really promising

This plugin promises to have what I wanted: to be able to create pages or posts and use that content for a widget + hide that page or post so that it doesn’t appear elsewhere

When I access the settings page, it give me an error ‘You do not have sufficient permissions to access this page.’

I’ve just seen that someone else also has the same problem in the last post made

Thanks

Omar