diff --git a/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/location/DistanceRequirementFactory.kt b/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/location/DistanceRequirementFactory.kt
index 0358bbb..97e5086 100644
--- a/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/location/DistanceRequirementFactory.kt
+++ b/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/location/DistanceRequirementFactory.kt
@@ -2,6 +2,7 @@ package me.gabytm.minecraft.arcanevouchers.voucher.requirements.implementations.
 
 import me.gabytm.minecraft.arcanevouchers.Constant.Requirement
 import me.gabytm.minecraft.arcanevouchers.actions.ArcaneActionManager
+import me.gabytm.minecraft.arcanevouchers.functions.warning
 import me.gabytm.minecraft.arcanevouchers.voucher.requirements.ArcaneRequirementFactory
 import me.gabytm.minecraft.arcanevouchers.voucher.requirements.implementations.common.variable.DoubleVariable
 import me.gabytm.minecraft.arcanevouchers.voucher.requirements.implementations.common.variable.LocationVariable
@@ -24,8 +25,18 @@ class DistanceRequirementFactory : ArcaneRequirementFactory<DistanceRequirement>
         val negated = type.startsWith(Requirement.NEGATION)
         val optional = source.getBoolean(Requirement.OPTIONAL)
 
-        val location = LocationVariable(source.getString("location") ?: return null)
-        val distance = DoubleVariable(source.getString("distance") ?: return null)
+        val location = LocationVariable(
+            source.getString("location") ?: kotlin.run {
+                warning("Could not load 'distance' requirement from ${source.currentPath}: missing required property 'location'")
+                return null
+            }
+        )
+        val distance = DoubleVariable(
+            source.getString("distance") ?: kotlin.run {
+                warning("Could not load 'distance' requirement from ${source.currentPath}: missing required property 'distance'")
+                return null
+            }
+        )
         val failActions = actionManager.parseActions(source.getStringList(Requirement.FAIL_ACTIONS))
         return DistanceRequirement(source.name, optional, negated, failActions, actionManager, location, distance)
     }
diff --git a/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/number/NumberRequirement.kt b/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/number/NumberRequirement.kt
index a994660..ad36185 100644
--- a/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/number/NumberRequirement.kt
+++ b/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/number/NumberRequirement.kt
@@ -35,7 +35,7 @@ class NumberRequirement(
     }
 
     @Suppress("unused")
-    enum class Operation(private val identifier: String) {
+    enum class Operation(val identifier: String) {
 
         EQUAL("==") {
             override fun check(left: Double, right: Double, negated: Boolean): Boolean {
diff --git a/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/number/NumberRequirementFactory.kt b/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/number/NumberRequirementFactory.kt
index d26b8fe..9eee23e 100644
--- a/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/number/NumberRequirementFactory.kt
+++ b/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/number/NumberRequirementFactory.kt
@@ -2,6 +2,7 @@ package me.gabytm.minecraft.arcanevouchers.voucher.requirements.implementations.
 
 import me.gabytm.minecraft.arcanevouchers.Constant.Requirement
 import me.gabytm.minecraft.arcanevouchers.actions.ArcaneActionManager
+import me.gabytm.minecraft.arcanevouchers.functions.warning
 import me.gabytm.minecraft.arcanevouchers.voucher.requirements.ArcaneRequirementFactory
 import me.gabytm.minecraft.arcanevouchers.voucher.requirements.implementations.common.variable.DoubleVariable
 import org.bukkit.configuration.ConfigurationSection
@@ -27,9 +28,20 @@ class NumberRequirementFactory : ArcaneRequirementFactory<NumberRequirement>() {
             type = type.substring(1)
         }
 
+        // Not adding a warning for this because it won't get to this point if the factory couldn't find an Operation
         val operation = NumberRequirement.Operation.find(type) ?: return null
-        val left = DoubleVariable(source.getString("left") ?: return null)
-        val right = DoubleVariable(source.getString("right") ?: return null)
+        val left = DoubleVariable(
+            source.getString("left") ?: kotlin.run {
+                warning("Could not load '${operation.identifier}' requirement from ${source.currentPath}: missing required property 'left'")
+                return null
+            }
+        )
+        val right = DoubleVariable(
+            source.getString("right") ?: kotlin.run {
+                warning("Could not load '${operation.identifier}' requirement from ${source.currentPath}: missing required property 'right'")
+                return null
+            }
+        )
         val failActions = actionManager.parseActions(source.getStringList(Requirement.FAIL_ACTIONS))
         return NumberRequirement(source.name, optional, negated, failActions, actionManager, left, right, operation)
     }
diff --git a/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/string/StringRequirement.kt b/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/string/StringRequirement.kt
index 11d1f39..778bc1d 100644
--- a/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/string/StringRequirement.kt
+++ b/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/string/StringRequirement.kt
@@ -26,7 +26,7 @@ class StringRequirement(
     }
 
     @Suppress("unused")
-    enum class Operation(private val identifier: String) {
+    enum class Operation(val identifier: String) {
 
         EQUALS("string equals") {
             override fun check(left: String?, right: String?, negated: Boolean): Boolean {
diff --git a/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/string/StringRequirementFactory.kt b/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/string/StringRequirementFactory.kt
index c0fa36a..f31ff08 100644
--- a/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/string/StringRequirementFactory.kt
+++ b/plugin/src/main/kotlin/me/gabytm/minecraft/arcanevouchers/voucher/requirements/implementations/string/StringRequirementFactory.kt
@@ -2,6 +2,7 @@ package me.gabytm.minecraft.arcanevouchers.voucher.requirements.implementations.
 
 import me.gabytm.minecraft.arcanevouchers.Constant.Requirement
 import me.gabytm.minecraft.arcanevouchers.actions.ArcaneActionManager
+import me.gabytm.minecraft.arcanevouchers.functions.warning
 import me.gabytm.minecraft.arcanevouchers.voucher.requirements.ArcaneRequirementFactory
 import org.bukkit.configuration.ConfigurationSection
 
@@ -27,8 +28,14 @@ class StringRequirementFactory : ArcaneRequirementFactory<StringRequirement>() {
         }
 
         val operation = StringRequirement.Operation.find(type) ?: return null
-        val left = source.getString("left") ?: return null
-        val right = source.getString("right") ?: return null
+        val left = source.getString("left") ?: kotlin.run {
+            warning("Could not load '${operation.identifier}' requirement from ${source.currentPath}: missing required property 'left'")
+            return null
+        }
+        val right = source.getString("right") ?: kotlin.run {
+            warning("Could not load '${operation.identifier}' requirement from ${source.currentPath}: missing required property 'right'")
+            return null
+        }
         val failActions = actionManager.parseActions(source.getStringList(Requirement.FAIL_ACTIONS))
         return StringRequirement(source.name, optional, negated, failActions, actionManager, left, right, operation)
     }