The Starter Classes Mod starts off the Rifleman with an Marksman rifle but the first rifleman class challenge requires a hunting rifle to get the thirty zombie kills. I just changed it to the marksman rifle in the mods quests xml as below. seems to have fixed it for me. just thought you should know if you wish to make the change yourself
as was
<quest id="challenge_rifleman1" group_name_key="quest_rifleman" name="Rifleman Quest" subtitle="Rifleman Challenge" description="Snipe some zombies" icon="ui_game_symbol_rifle"
repeatable="false" category_key="challenge" offer="A single shot is all it takes, show your skill with your rifle and kill some zombies. " difficulty="easy">
<requirement type="Holding" id="gunRifleT1HuntingRifle" />
<objective type="ZombieKill" value="30" />
<reward type="Quest" id="rifleman_visit_trader" />
</quest>
the change
<quest id="challenge_rifleman1" group_name_key="quest_rifleman" name="Rifleman Quest" subtitle="Rifleman Challenge" description="Snipe some zombies" icon="ui_game_symbol_rifle"
repeatable="false" category_key="challenge" offer="A single shot is all it takes, show your skill with your rifle and kill some zombies. " difficulty="easy">
<requirement type="Holding" id="gunRifleT2MarksmanRifle" />
<objective type="ZombieKill" value="30" />
<reward type="Quest" id="rifleman_visit_trader" />
</quest>
sorry if I brought this up in the wrong way or format I dont post very often. Thanks for keeping Vals mods alive.