Here is a new version of that group that should work. You can delete the old group named "Kodi Payload Actions" and then copy and paste the following into your tree.
Or if you are still using a stock config, you can replace the file "voicecommands.xml" in your root VC folder with the attached file instead.
<?xml version="1.0" encoding="utf-16"?>
<!--VoxCommando 2.1.3.8-->
<commandGroup open="False" name="Kodi Payload Actions" enabled="True" prefix="" priority="0" requiredProcess="" description="">
<command id="354" name="Seek to {1}%" enabled="true" alwaysOn="False" confirm="False" requiredConfidence="0" loop="False" loopDelay="0" loopMax="0" description="">
<action>
<cmdType>XJson.Raw</cmdType>
<params>
<param>Player.GetActivePlayers</param>
</params>
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>Results.RegEx</cmdType>
<params>
<param>"playerid": (.*),</param>
</params>
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>XJson.Raw</cmdType>
<params>
<param>Player.Seek</param>
<param>"value":{1},"playerid":{Match.1}</param>
</params>
<cmdRepeat>1</cmdRepeat>
</action>
<phrase>seek, seek to</phrase>
<payloadList>0,5,10,20,30,40,50,60,70,80,90,99,100</payloadList>
<phrase optional="true">percent</phrase>
</command>
<command id="318" name="setvolume" enabled="true" alwaysOn="False" confirm="False" requiredConfidence="0" loop="False" loopDelay="" loopMax="" description="">
<action>
<cmdType>XJson.SetVol</cmdType>
<params>
<param>{1}</param>
</params>
<cmdRepeat>1</cmdRepeat>
</action>
<phrase>set volume</phrase>
<payloadList>5,10,15,20,30,40,50,60,70,80,90,100</payloadList>
</command>
<command id="418" name="zoom in/out multiple {1} {2}" enabled="true" alwaysOn="False" confirm="False" requiredConfidence="0" loop="False" loopDelay="0" loopMax="0" description="">
<action>
<cmdType>XJson.Raw</cmdType>
<params>
<param>Input.ExecuteAction</param>
<param>"action":"zoom{1}"</param>
</params>
<cmdRepeat>{2}</cmdRepeat>
</action>
<phrase>zoom</phrase>
<payloadList>in,out</payloadList>
<payloadList optional="true">1,2,3,4,5,10,15,20,25</payloadList>
</command>
</commandGroup>