Errors/Chain errors
BasketSwapBatchEmpty
Check the argument values against the operation schema
swap_basket_many was submitted without any trade legs. Include at least one origin/destination/amount leg; one call accepts at most 128 legs.
Declared by the SubtensorModule pallet; it classifies to the semantic code invalid_argument.
Declared at pallets/subtensor/src/macros/errors.rs#L412.
Remediation
Check the argument values against the operation schema
The same explanation is available in the terminal: btcli explain BasketSwapBatchEmpty.