Updating Display get error: Pattern of MAC-address is not "xx-xx-xx-xx-xx-xx" (x = digit or letter)

1

Hi all,
using Xibo CMS 1.7.7 .
Updating Display:
When I select to “Wake On LAN” then “Send” , I get the following error:
Pattern of MAC-address is not “xx-xx-xx-xx-xx-xx” (x = digit or letter)

I do not understand why get such error.
Attached screen shot of log:

Thanks for any advise,

error.jpg1280×720 139 KB

2

Looks like you ran into a bug, please see here