MinimumThreshold

The multisig threshold argument was below 2, which these calls do not accept. Pass a threshold of 2 or more, or use as_multi_threshold_1 for the single-approval case.

Declared by the Multisig 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 MinimumThreshold.