diff --git a/app/Controllers/Activities.php b/app/Controllers/Activities.php
index ce67973..091378d 100644
--- a/app/Controllers/Activities.php
+++ b/app/Controllers/Activities.php
@@ -1141,8 +1141,30 @@ class Activities extends Controller {
 			]);
 		}
 
+		if (! is_writable($uploadDir)) {
+			log_message('error', 'Upload directory is not writable: {path}', ['path' => $uploadDir]);
+
+			return $this->response->setStatusCode(500)->setJSON([
+				'status' => 'error',
+				'message' => 'Upload directory is not writable',
+			]);
+		}
+
 		$filename = basename(str_replace('\\', '/', $file->getClientName()));
-		if (! $file->move($uploadDir, $filename, true)) {
+
+		try {
+			$uploaded = $file->move($uploadDir, $filename, true);
+		} catch (\Throwable $e) {
+			log_message('error', 'Attachment upload failed: {message}', ['message' => $e->getMessage()]);
+
+			return $this->response->setStatusCode(500)->setJSON([
+				'status' => 'error',
+				'message' => 'Unable to save upload',
+				'error' => $e->getMessage(),
+			]);
+		}
+
+		if (! $uploaded) {
 			return $this->response->setStatusCode(500)->setJSON([
 				'status' => 'error',
 				'message' => 'Unable to save upload',