To get to future era you have to have played long enough to be aware what eras are available, once completed they do just stop as there is nothing to continue. Hence my confusion as you can't have been playing for a couple of weeks and got to your era, so should have some knowledge of the eras especially too complete the VF map early.
You also seem to acknowledge VF is the end one and your thread title says you've completed them.
Either way I gave you a full answer for your question.