Open your Skill_types.xml

Find the Enslave block and Remove the Requirements

			<ability lvl="0" name="Enslave" id="345">
				<duration const="">6</duration>
				<ability_skill_mult>0</ability_skill_mult>
				<icon>art\2D\skills\abilities\coup_de_grace.png</icon>
				<entities>
					<entity type="player">
						<ent_reqs/>
					</entity>
				</entities>
				<requirements>
					<req type="warstance">allowed</req>
					<req type="world">red</req>
					<req type="jh">only</req>
				</requirements>
				<results>
					<animation>mowing</animation>
					<sound>player_perform</sound>
					<sstam_spent>30</sstam_spent>
				</results>
			</ability>
		</abilities>
	</row>

so it looks like the below block, ensure this file is shared with client.

<ability lvl="0" name="Enslave" id="345">
				<duration const="">20</duration>
				<ability_skill_mult>0</ability_skill_mult>
				<icon>art\2D\skills\abilities\coup_de_grace.png</icon>
				<entities>
					<entity type="player">
						<ent_reqs/>
					</entity>
				</entities>
				<results>
					<animation>mowing</animation>
					<sound>player_perform</sound>
					<sstam_spent>30</sstam_spent>
				</results>
			</ability>
		</abilities>
	</row>