I am trying to create the new Ranger Variant realease by Wizards in UA but I am facing a problem with Hit Dice.

Please take a look in the following snippet:

Code:
        <hp>
          <hitdice>
            <name type="string">Hit Dice</name>
            <text type="string">2d6 per ranger level</text>
          </hitdice>
          <hitpointsat1stlevel>
            <name type="string">Hit Points at 1st Level</name>
            <text type="string">12 + your Constitution modifier</text>
          </hitpointsat1stlevel>
          <hitpointsathigherlevels>
            <name type="string">Hit Points at Higher Levels</name>
            <text type="string">2d6 (or 7) + your Constitution modifier per ranger level after 1st</text>
          </hitpointsathigherlevels>
        </hp>
Fantasy Ground simply does not recognize 2d6.

Any adivice?