Before activating the plugin, I put in several post tags individually, and pointed them to a couple of posts. Then, I activated the plugin, hoping to bulk add a list of tags I've got in a text document. I clicked the Bulk Add Tags link provided in the Post Tags tab, and an iframe opens showing a "page not found" with a dropdown admin menu at the very top. Nothing else. I can access my admin panel; add posts, pages etc. but there is no place to bulk add tags. The resource links listed for the plugin (plugin site link and author link) do not offer any support or acknowledgement of the plugin's existence. There is no further documentation. This plugin was tried on a fresh WordPress install with the default theme. No other plugins were installed/activated except for Akismet.