Running with no addons except zygor and I get this Mount Hyjal step 8

[kyrek]

Message: ...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:3496: {{...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:268: Failed to add map node 2644 type start}}
Time: 11/07/16 07:16:34
Count: 1
Stack: [C]: ?
...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:3496: in function `OnUpdate'
...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:929: in function <...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:929>

Locals: (*temporary) = "{{...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:268: Failed to add map node 2644 type start}}"

[ZG Support 1]

We are aware of the LibRover errors and working on getting them fixed.