Yup it started working. Could be cleaner but I don't know which bits fixed it so I'm leaving all of it.

main.js

@@ -1,10 +1,14 @@
 /*
- * Copyright 2020 Netsyms Technologies.
+ * Copyright 2020-2021 Netsyms Technologies.
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
+/*
+ * Matrix really, really, really needs better SDK docs.
+ */
+
 console.log("Starting up...");
 import sdk from 'matrix-js-sdk';
 import fs from 'fs';