diff --git a/src/stores/allMapData.ts b/src/stores/allMapData.ts
index 7d8cc55..b48f531 100644
--- a/src/stores/allMapData.ts
+++ b/src/stores/allMapData.ts
@@ -234,6 +234,7 @@ export const useAllMapDataStore = defineStore("allMapDataStore", {
           return;
         }
         apiError(error, "Failed to load the Trace Detail.");
+        return [];
       }
     },
     /**
@@ -278,6 +279,7 @@ export const useAllMapDataStore = defineStore("allMapDataStore", {
           return;
         }
         apiError(error, "Failed to load the Base Trace Detail.");
+        return [];
       }
     },
     /**
diff --git a/src/stores/compare.ts b/src/stores/compare.ts
index 4acc59f..c19f339 100644
--- a/src/stores/compare.ts
+++ b/src/stores/compare.ts
@@ -64,6 +64,7 @@ export const useCompareStore = defineStore("compareStore", {
         return response.data.stats;
       } catch (error) {
         apiError(error, "Failed to load the Compare's States.");
+        return null;
       }
     },
     /**
diff --git a/src/stores/conformance.ts b/src/stores/conformance.ts
index c0fbfce..5b16f7c 100644
--- a/src/stores/conformance.ts
+++ b/src/stores/conformance.ts
@@ -353,6 +353,7 @@ export const useConformanceStore = defineStore("conformanceStore", {
           error,
           "Failed to Get the detail of a temporary log conformance issue.",
         );
+        return null;
       }
     },
     /**
@@ -393,6 +394,7 @@ export const useConformanceStore = defineStore("conformanceStore", {
           error,
           "Failed to Get the detail of a temporary log conformance loop.",
         );
+        return null;
       }
     },
     /**