Workaround for now: • Activate your extensions and theme as normal. • After it completes, edit the compiled JavaScript. • Find this:

for (var [key, value] of params.entries()) {
   !hashedUrl.searchParams.has(key) && hashedUrl.searchParams.append(key, value);
}

• And replace it with this:

params.forEach(function(value, key) {
  if (!hashedUrl.searchParams.has(key)) {
    hashedUrl.searchParams.append(key, value);
  }
});

You may need to clear the cache afterwards. Can you let me know if this works?