A transaction outside Shade’s curves

Program 6EF8rrecthR5Dkzon8Nwu78hRvfCKubJ14M5uBEwF6P invoke [1]
Program log: Instruction: Sell
Program log: AnchorError caused by account: associated_user. Error Code: AccountNotInitialized. Error Number: 3012. Error Message: The program expected this account to be already initialized.
Program 6EF8rrecthR5Dkzon8Nwu78hRvfCKubJ14M5uBEwF6P consumed 11547 of 403000 compute units
Program 6EF8rrecthR5Dkzon8Nwu78hRvfCKubJ14M5uBEwF6P failed: custom program error: 0xbc4