I have a list on a root site (SP 2010). I want to create a list view webpart on a subsite that is connected to the list on the root site.
All the guides I have read online say to go into the listview on the root site and export the webpart (as either a file or to gallery - I have been trying both of these options). When I then import this webpart onto a page on a subsite I immediately get an error:
An unexpected error has occurred.
Web Parts Maintenance Page: If you have permission, you can use this page to temporarily close Web Parts or remove personal settings. For more information, contact your site administrator.
The page is then inaccessible, to fix this I have to roll back to the previous version or use the web parts maintenance page to delete the webpart I have imported.
What is it that it causing me grief, whereas all the info online where everyone else follows these steps it seems to work fine?