Recently we did a new install to Joomla 3.4. All was well. After we installed xmap we started getting an error in the admin control panel. It looked like this.
joomla 3.4 _weblinks' doesn't exist
Turns out Joomla 3.4 no longer installs the previously default Weblinks component, which we never used anyway. But, apparently, xmap references it. The easy solution was to install the weblinks component which can be found here. https://github.com/joomla-extensions/weblinks/releases
Just install it, and the error goes away.