diff --git a/app/appearance/langs/en_US.json b/app/appearance/langs/en_US.json
index c5282c5a4..5900c18df 100644
--- a/app/appearance/langs/en_US.json
+++ b/app/appearance/langs/en_US.json
@@ -1026,7 +1026,7 @@
     "73": "Importing, please wait...",
     "74": "The kernel has not been fully booted [%d%%], please try again later",
     "75": "Attempt to access file failed",
-    "76": "TODO",
+    "76": "The network connectivity verification of the cloud storage service provider is abnormal, please check the network configuration",
     "77": "Invalid dir path [%s]",
     "78": "The old and new paths are repeated",
     "79": "Only supports importing Markdown document",
diff --git a/app/appearance/langs/es_ES.json b/app/appearance/langs/es_ES.json
index 6db3e5b93..c384168ec 100644
--- a/app/appearance/langs/es_ES.json
+++ b/app/appearance/langs/es_ES.json
@@ -1026,7 +1026,7 @@
     "73": "Importando, por favor espere...",
     "74": "El kernel no ha sido arrancado completamente [%d%%], por favor, inténtelo de nuevo más tarde",
     "75": "Error al intentar acceder al archivo",
-    "76": "TODO",
+    "76": "La verificaci\u00f3n de conectividad de red del proveedor de servicios de almacenamiento en la nube es anormal, verifique la configuraci\u00f3n de red",
     "77": "Ruta inválida [%s]",
     "78": "Los viejos y nuevos caminos se repiten",
     "79": "Sólo admite la importación de documentos Markdown",
diff --git a/app/appearance/langs/fr_FR.json b/app/appearance/langs/fr_FR.json
index 6867cd17c..63fc391a8 100644
--- a/app/appearance/langs/fr_FR.json
+++ b/app/appearance/langs/fr_FR.json
@@ -1026,7 +1026,7 @@
     "73": "En cours d'importation, veuillez patienter...",
     "74": "Le kernel n'a pas été complètement démarré [%d%%], veuillez réessayer plus tard.",
     "75": "La tentative d'accès au fichier a échoué",
-    "76": "TODO",
+    "76": "La vérification de la connectivité réseau du fournisseur de service de stockage cloud est anormale, veuillez vérifier la configuration réseau",
     "77": "Chemin d'accès invalide [%s]",
     "78": "Les anciens et les nouveaux chemins sont répétés",
     "79": "Prise en charge de l'importation de documents Markdown uniquement",
diff --git a/app/appearance/langs/zh_CHT.json b/app/appearance/langs/zh_CHT.json
index 7c7e4861a..d7059338f 100644
--- a/app/appearance/langs/zh_CHT.json
+++ b/app/appearance/langs/zh_CHT.json
@@ -1026,7 +1026,7 @@
     "73": "正在導入，請稍等...",
     "74": "kernel尚未完全啟動 [%d%%]，請稍後再試",
     "75": "嘗試訪問資料檔失敗",
-    "76": "TODO",
+    "76": "雲端存儲服務提供商網絡連通性校驗異常，請檢查網絡配置",
     "77": "不可用的目錄路徑 [%s]",
     "78": "新老路徑重複",
     "79": "僅支援導入 Markdown 文檔",
diff --git a/app/appearance/langs/zh_CN.json b/app/appearance/langs/zh_CN.json
index ad611e7f7..577ab1cf7 100644
--- a/app/appearance/langs/zh_CN.json
+++ b/app/appearance/langs/zh_CN.json
@@ -1026,7 +1026,7 @@
     "73": "正在导入，请稍等...",
     "74": "内核尚未完全启动 [%d%%]，请稍后再试",
     "75": "尝试访问文件失败",
-    "76": "TODO",
+    "76": "云端存储服务提供商网络连通性校验异常，请检查网络配置",
     "77": "不可用的目录路径 [%s]",
     "78": "新老路径重复",
     "79": "仅支持导入 Markdown 文档",
diff --git a/kernel/model/sync.go b/kernel/model/sync.go
index cb82537fd..296fd3c56 100644
--- a/kernel/model/sync.go
+++ b/kernel/model/sync.go
@@ -566,15 +566,20 @@ func planSyncAfter(d time.Duration) {
 	syncPlanTime = time.Now().Add(d)
 }
 
-func isProviderOnline() bool {
+func isProviderOnline() (ret bool) {
 	switch Conf.Sync.Provider {
 	case conf.ProviderSiYuan:
-		return util.IsOnline(util.SiYuanSyncServer)
+		ret = util.IsOnline(util.SiYuanSyncServer)
 	case conf.ProviderS3:
-		return util.IsOnline(Conf.Sync.S3.Endpoint)
+		ret = util.IsOnline(Conf.Sync.S3.Endpoint)
 	case conf.ProviderWebDAV:
-		return util.IsOnline(Conf.Sync.WebDAV.Endpoint)
+		ret = util.IsOnline(Conf.Sync.WebDAV.Endpoint)
 	default:
-		return util.IsOnline("")
+		ret = util.IsOnline("")
 	}
+
+	if !ret {
+		util.PushErrMsg(Conf.Language(76), 5000)
+	}
+	return
 }