fix: Fluxlist undefined error fix (#118)

Author: Hubert-Szczepanski-SAP

public/locales/en.json

@@ -16,7 +16,8 @@
     "tableVersionHeader": "Revision",
     "noFluxError": "Please install flux to view this component",
     "gitOpsTitle": "GitOps",
-    "kustomizationsTitle": "Kustomizations"
+    "kustomizationsTitle": "Kustomizations",
+    "undefinedError": "Something went wrong"
   },
   "ProvidersList": {
     "tableNameHeader": "Name",

src/components/ControlPlane/FluxList.tsx

@@ -138,7 +138,11 @@ export default function FluxList() {
   if (repoErr || kustomizationErr) {
     return (
       <IllustratedError
-        details={repoErr.message || kustomizationErr.message}
+        details={
+          repoErr?.message ||
+          kustomizationErr?.message ||
+          t('FluxList.undefinedError')
+        }
         title={t('FluxList.noFluxError')}
       />
     );