diff --git a/package.json b/package.json
index 567f78e..8ddc9fa 100644
--- a/package.json
+++ b/package.json
@@ -82,4 +82,4 @@
       "@commitlint/config-conventional"
     ]
   }
-}
\ No newline at end of file
+}
diff --git a/static/scripts/render-manifest.ts b/static/scripts/render-manifest.ts
index 67cf768..26e6ce5 100644
--- a/static/scripts/render-manifest.ts
+++ b/static/scripts/render-manifest.ts
@@ -412,6 +412,10 @@ export class ManifestRenderer {
   private _writeNewConfig(option: "add" | "remove"): void {
     const selectedManifest = localStorage.getItem("selectedPluginManifest");
     if (!selectedManifest) {
+      toastNotification("No selected plugin manifest found.", {
+        type: "error",
+        shouldAutoDismiss: true,
+      });
       throw new Error("No selected plugin manifest found");
     }
     const pluginManifest = JSON.parse(selectedManifest) as Manifest;
@@ -437,6 +441,10 @@ export class ManifestRenderer {
     });
 
     if (!pluginUrl) {
+      toastNotification(`No plugin URL found for ${pluginName}.`, {
+        type: "error",
+        shouldAutoDismiss: true,
+      });
       throw new Error("No plugin URL found");
     }