The following error happens when there might not be an active window (such as when switched to an empty workspace in xmonad). Switching to an empty workspace is not an error, but it's unlikely to be the only cause for the error.
2015-07-03 23:18:17,733 ERROR from X11Watcher: Error while updating active window, trying again.
The following error happens when there might not be an active window (such as when switched to an empty workspace in xmonad). Switching to an empty workspace is not an error, but it's unlikely to be the only cause for the error.