The sender signature validation reverted or ran out of gas (OOG).
Possible Solutions
- Check that the
verificationGasLimit
is high enough to cover the gas costs ofvalidateUserOp
. - If you are not using a paymaster, check that the sender has enough native tokens to cover the required prefund.
- If you are us a paymaster to cover the gas fees, verify that the paymaster and data fields are set.