Could it be that the stock is so illiquid and infrequently traded that there were no sell orders in existence for your brokerages to match with your buy order, and so you got the "not available" message? Trading volume yesterday was zero shares. Presumably you were trading during market hours, right?
If you see an ask price, and you see a bid/ask size published, then was your order smaller than the minimum size. E.g. Your broker could not match your order for 10 shares with the minimum of 50 shares your counterparty entered?
Or, it could simply be your brokers' policy not to let their customers get stuck in illiquid stocks, which are often unloaded onto retail traders by professional market manipulators or as part of pump and dump scams. Such customers tend to get angry and use up a lot of customer service hours demanding to know why they can't sell their shares, when the answer is simply that there's nobody in the world who wants to buy them. Then, the angry customers abandon their accounts with 18 unsellable shares of a penny stock and the brokerage has to spend money on the abandoned property process to get rid of the accounting mess. Review your terms of service or contact customer service to confirm if this is the case. Brokers often protect their customers from bad ideas, so keep an open mind about what they see that you can't see.
