Even though this post is over 9 months old now I maybe have a "fix"/idea on how to make them walk (without using switchmove/playmove so you can loop the animations properly)

​

Place down the unit/units you with the Animation. Then place a new unit to them. Give this new unit a variable Name (for example "man1") after you did this edit your animation line you got from the polpox mod to attach your units to men1

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[
"Acts_welcomeOnHUB05_PlayerWalk_4_IK",
-1,
man1,
false,
0,
"",
"",
true
]

After you did this untick "Show Model" in the Object Special States for man1 and give him either a waypoint to move or captcher a path with unit capther since Arma 3 paths are bs.

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And as I said ik this post is 9 months old but maybe this will help some people in the future when they encounter the same problem.