Why am I unable open a cryptocurrency position in AAVE?

Before you can trade cryptocurrencies, you need to log into Client Portal and request trading permissions. Choose from Basic and Crypto Plus trading permission. See What trading permissions do I need to trade cryptocurrencies? …

When creating an order to close a Complex Position, you may see the message stating "Account XXX has a difference between the stored and implied position in (the complex position). The order size will be calculated using the implied position."

You received this message because you are submitting an order to close, roll or modify a Complex Position using the “% Change” feature and the quantity of open option positions in your account available to close for this order is different from what might be expected based on your original position. You may have previously rolled one leg of the original combo created as a Complex Position or increased your position by legging into more options…

Before you can trade cryptocurrencies via the Cryptocurrency Service Provider's web app, you need to enable Crypto Plus trading permissions in the IBKR Client Portal. 

Once you have enabled Crypto Plus, all buy orders must be…

No, you must open (or have) an IBKR securities brokerage account with trading permissions other than Cryptocurrency first. You then might be eligible to request cryptocurrency trading permissions, at which point a Cryptocurrency Service Provider account will be created for you and linked to your IBKR trading platform's interface. To keep the cryptocurrency trading permissions you must maintain at least half of your account activity in something other than cryptocurrency. …