diff --git a/src/www/app/outline_server_repository/access_key_serialization.ts b/src/www/app/outline_server_repository/access_key_serialization.ts
index eadd91e4f0..a3c57f7b97 100644
--- a/src/www/app/outline_server_repository/access_key_serialization.ts
+++ b/src/www/app/outline_server_repository/access_key_serialization.ts
@@ -86,6 +86,10 @@ export async function fetchShadowsocksSessionConfig(configLocation: URL): Promis
 
     return parseShadowsocksSessionConfigJson(responseBody);
   } catch (cause) {
+    if (cause instanceof errors.SessionConfigError) {
+      throw cause;
+    }
+
     throw new errors.ServerAccessKeyInvalid('Failed to parse VPN information fetched from dynamic access key.', {
       cause,
     });