diff --git a/src/main/java/modchest/mixin/ServerPlayerEntityMixin.java b/src/main/java/modchest/mixin/ServerPlayerEntityMixin.java
index 06c2e4a..0a70b69 100644
--- a/src/main/java/modchest/mixin/ServerPlayerEntityMixin.java
+++ b/src/main/java/modchest/mixin/ServerPlayerEntityMixin.java
@@ -32,13 +32,25 @@ public abstract class ServerPlayerEntityMixin implements ServerPlayerEntityInter
 
     @Inject(method = "writeCustomDataToNbt", at = @At("TAIL"))
     public void writeCustomDataToNbt(NbtCompound nbt, CallbackInfo ci) {       //Immer wenn eine andere Methode aufruft, dass Daten abgespeichert werden sollen, tun wir das jetzt auch
-        nbt.put("REServerMod", this.dataSaver);
+        if (dataSaver != null) {    //wenn der dataSaver null ist, wuerde sonst ein Error kommen, weil Minecraft keine leeren NBTs absepeicheern kann :(
+            try {
+                nbt.put("REServerMod", this.dataSaver);
+            } catch (Exception e) {
+                REServerMod.LOGGER.info("Error while saving custom NBt-Data: " + e);
+            }
+        } else {
+            REServerMod.LOGGER.info("write failed! This probably means, that the player hasn't set a custom spanpoint yet");
+        }
         //REServerMod.LOGGER.info("writeCustomDataToNbt called");
     }
 
     @Inject(method = "readCustomDataFromNbt", at = @At("TAIL"))
     public void readCustomDataFromNbt(NbtCompound nbt, CallbackInfo ci) {       //gleiches beim einlesen. Werden NBT-Daten eingelesen, tun wird das auch
-        dataSaver = (NbtCompound) nbt.get("REServerMod");
+        try {
+            dataSaver = (NbtCompound) nbt.get("REServerMod");
+        } catch (Exception e) {
+            REServerMod.LOGGER.info("Error while saving custom NBt-Data: " + e);
+        }
         //REServerMod.LOGGER.info("readCustomDataFromNbt called with following Data: " + Arrays.toString(nbt.getIntArray("REServerMod.sleep_data")));
     }