THE MARKET IS UNAVAILABLE
The message ‘Continue playing FUT on your platform to unlock access to the Transfer Market’ means to keep playing FUT and following EA rules. Once you’ve started playing on your platform, you’ll get an update to your status in the Transfer Market. That means you’ll either gain access to the Transfer Market, or you’ll see a different message letting you know why you still can’t access it.
If you haven’t played FUT 19 on the console where you plan to play FUT 21, the Companion and the Web App will not make available the market’s earlier access. You need to validate first your FIFA 21 account in the new console to unlock the market. Access to trading won’t be immediate and could take several days. Some accounts with previous FUT 20 history will be allowed to trade, while others will not. This is also true for accounts with multiple personas, as all persona data is treated separately in FUT 21. Playing FUT 19 will not give your FUT 21 account access to the Transfer Market.