If I am not mistaken, if your are a brand new silver account (no previous accounts pre-F2P) you only get 1 Federation Character Slot and 1 Klingon Character Slot.
Since creating the required Foundry Test Character requires you to use one of your character slots...
If you want Foundry on a new Silver account you cant play the actual game with that faction, unless you attain extra character slots
I dont know if you can see they 'Add Foundry Slots' button until you create your test character
Thank you so much for clarifying this! I really wish I knew that the foundry was completely broken before I bought additional character slots. I thought I was going crazy because every time I tried to buy the foundry slots it acted like it was going to do it and then it just had some unexplained error. I didn't know if this was my problem or not and most people in game didn't know. To me, it is absurd that they haven't fixed this yet but I suppose Cryptic has much bigger problems on their hands.