i dont know what to do pls help me
Can you give us a little more detail about your setup and how you usually sign your transactions? I'm assuming you're using some form of offline signing device, like a hardware wallet, right?
The warning message you're getting suggests that the transaction data is too complex to fit into a QR code. This is a common issue when dealing with large transactions with many inputs. Basically, you have two options. You can either try an alternative way to sign the transaction, like others have already suggested. Or, you can create a new transaction using fewer inputs so the data fits in the QR code.
Which of the two options suits you better depends on your your setup and your specific situation.