Errors/Chain errors
WeightVecLengthIsLow
Check the argument values against the operation schema
The weight submission has fewer entries than the subnet's minimum (setting only a self-weight is the one exception). Compare the vector length against the MinAllowedWeights (min_allowed_weights hyperparameter) for the netuid.
Declared by the SubtensorModule 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 WeightVecLengthIsLow.