Hi, We have updated our SmartContract address long time ago following are the new SmartContract addresses for MESH and SMT The new contract address for MeshBox: 0xcf9fbffec9e0e5bbc62e79bf1965f5db76955661 The new contract address for SmartMesh: 0x21f15966e07a10554c364b988e91dab01d32794a
you need to add custom token in your wallet with above corresponding address, then your new tokens will appear, after that you can map your tokens (only SMT) with Tango app (https://smartmesh.io/app) then you can make a successful transaction.
NOTE: after mapping you can only keep your SMT in Tango app or Ozone, all other wallets doesnt support SMT as it's running on Spectrum (https://spectrum.pub)