InvalidCallFlags

Check the argument values against the operation schema

The flags bitmask given to seal_call or seal_delegate_call contains an unknown or disallowed combination; delegate calls accept only a restricted flag set. Check the flags argument against the supported CallFlags bit values.

Declared by the Contracts pallet; it classifies to the semantic code invalid_argument.

Remediation

Check the argument values against the operation schema

The same explanation is available in the terminal: btcli explain InvalidCallFlags.