Hi,
In fact it's normal, here's how you need to proceed:
1) On the Arturia's Vox page, right click on the "Keylab 49/61 MIDI map for VOX V" link and select Save Link As
2) Plug your Keylab 49, launch MIDI Control Center and click on "Import" (left panel, on the bottom)
3) Import the link into MCC
4) Enjoy!