diff --git a/src-tauri/src/commands/get_version_message.rs b/src-tauri/src/commands/get_version_message.rs
index aa7637c..49c4b80 100644
--- a/src-tauri/src/commands/get_version_message.rs
+++ b/src-tauri/src/commands/get_version_message.rs
@@ -1,7 +1,8 @@
+use crate::commands::requests::ApiResponse;
 use crate::service::version::VersionService;
 
 #[tauri::command]
-pub async fn get_version_message(site: String) -> Result<String, String> {
+pub async fn get_version_message(site: String) -> Result<ApiResponse, String> {
     if site.trim().is_empty() {
         return Err("site is empty".to_string());
     }
@@ -9,12 +10,5 @@ pub async fn get_version_message(site: String) -> Result<String, String> {
     let version_service = VersionService::new(site);
     let version_message = version_service.get_version_message().await;
 
-    if version_message.status == 200 && version_message.success {
-        Ok(version_message.data)
-    } else if version_message.status == 404 {
-        Ok("incompatible".to_string())
-    } else {
-        Ok("".to_string())
-    }
+    Ok(version_message)
 }
-
diff --git a/ui/components/SideBar/profile.vue b/ui/components/SideBar/profile.vue
index b109154..bb76946 100644
--- a/ui/components/SideBar/profile.vue
+++ b/ui/components/SideBar/profile.vue
@@ -12,6 +12,12 @@ interface VersionAlertPayload {
   version?: string;
 }
 
+interface VersionMessageResponse {
+  status: number;
+  data: string;
+  success: boolean;
+}
+
 const props = defineProps<{ collapse: boolean }>();
 
 const recentSiteLimit = 5;
@@ -309,17 +315,17 @@ const handleClearInput = () => {
   recentSitesDismissed.value = false;
 };
 
-function normalizeVersionMessage(raw: string) {
-  if (raw === "incompatible") {
+function normalizeVersionMessage(response: VersionMessageResponse) {
+  if (response.status === 404) {
     return { status: "incompatible" as const, versions: [] as string[] };
   }
 
-  if (!raw) {
+  if (!response.data) {
     return { status: "list" as const, versions: [] as string[] };
   }
 
   try {
-    const parsed = JSON.parse(raw);
+    const parsed = JSON.parse(response.data);
     const versions = Array.isArray(parsed)
       ? parsed.map((item) => (item == null ? "" : String(item))).filter((v) => v.length > 0)
       : [];
@@ -361,13 +367,33 @@ const emitVersionAlertAndCloseModal = (payload: VersionAlertPayload) => {
   useEventBus().emit("versionAlert", payload);
 };
 
+const handleInvalidSiteVersion = () => {
+  clearLoginBtnUnlockTimer();
+  loginBtn.value = false;
+  hasValidationError.value = true;
+  errorMessage.value = t("Login.InvalidSiteError");
+
+  void useTauriCoreInvoke("auth_cancel", {});
+
+  nextTick(() => {
+    inputRef.value?.$el?.querySelector("input")?.focus();
+  });
+};
+
 const checkVersionBeforeOAuth = async (site: string) => {
-  const [rawVersionMessage, appVersion] = await Promise.all([
-    useTauriCoreInvoke<string>("get_version_message", { site }).catch(() => ""),
+  const [versionResponse, appVersion] = await Promise.all([
+    useTauriCoreInvoke<VersionMessageResponse>("get_version_message", { site }).catch((error) => {
+      return null;
+    }),
     useTauriAppGetVersion().catch(() => "")
   ]);
 
-  const { status: versionStatus, versions } = normalizeVersionMessage(rawVersionMessage);
+  if (!versionResponse || versionResponse.status === 0) {
+    handleInvalidSiteVersion();
+    return false;
+  }
+
+  const { status: versionStatus, versions } = normalizeVersionMessage(versionResponse);
 
   if (versionStatus === "incompatible") {
     emitVersionAlertAndCloseModal({ type: "incompatible" });
@@ -621,7 +647,7 @@ onMounted(async () => {
     let description = message || t("Login.LoginFailedErrorPage");
 
     if (reason === "invalid-site") {
-      description = t("Login.InvalidSiteError");
+      description = t(" ");
     }
 
     toast.add({