Re: Madden 22 Mobile
Check this thread out here regarding this very issue: https://answers.ea.com/t5/Madden-NFL-Mobile/Madden-22-Mobile-crashes-repeatedly-in-Trades/m-p/10658245#M52454
If you are crashing upon attempting to add a specific player to a trade, it is connected to that player being in a duplicate lineup of yours.
In order to resolve this, go to your Team/lineup screen and click the down arrow next to where it says "Default Lineup" here:
From there, a screen that looks like the following should pop-up:
Click the lineup(s) that would not be considered your Default one. In this example, it would be "New Lineup". After selecting your multiple lineup, click that little pen icon to the left of the drop-down menu. Then, click "Delete". This will remove any extra lineup(s) you may have made outside of your Default one so you can proceed to complete the trade without crashing.