Loss of Player Option

DrNostromo taught me how to prepare a scenario some time ago. But I have run into a problem.

The module has two sides and units of opposing sides are hidden from each other. When I prepared a scenario from the base module, I was able to open the scenario, but only as the side that I was on when I prepared the scenario. The option of which of the two players to play was lost.

Anyone have an idea as to what went wrong?

Any help on how to fix the scenario so that it can be joined as one of the two players again?

You have to ‘Retire’ from the side you are playing and become an Observer before you save the scenario.

Thanks, Unfortunately, that was not mentioned in the instructions to make a scenario.