Worker is rejecting machine-generated ESModule

// ...
$c_LDefault$.prototype.scheduled = (function(arg, arg$2, arg$3) {
  return this.scheduled__sjs_js_Object__sjs_js_Object__LCtx__sjs_js_Promise(arg, arg$2, arg$3);
});
var $d_LDefault$ = new $TypeData().initClass($c_LDefault$, "Default$", ({
  LDefault$: 1
}));
var $n_LDefault$;
function $m_LDefault$() {
  if ((!$n_LDefault$)) {
    $n_LDefault$ = new $c_LDefault$();
  }
  return $n_LDefault$;
}
// ...
let $e_default = $m_LDefault$();
export { $e_default as default };