"ExecutionError": "Smart contract panicked: .: MultiValidator .: ObjectValidator inner validation failed on key memo with .: MultiValidator .: MinLengthValidator data.length < minLength data.length=0, minLength=1\\n at requireValidate (build/contract.js:2451)\\n at <anonymous> (build/contract.js:2129)\\n at <anonymous> (build/contract.js:3737)\\n at storageDepositRefundWrapper (build/contract.js:4021)\\n at nft_transfer (build/contract.js:3738)\\n at apply (native)\\n at <anonymous> (build/contract.js:3651)\\n at apply (native)\\n at <anonymous> (build/contract.js:1548)\\n at nft_transfer (build/contract.js:4496)\\n"