Z-NOMP if (!payload) throw new Error('Invalid checksum')

anybody help me ? do you know what this error means ?

2017-04-04 21:19:30 [Payments] [zcash] Finished interval - time spent: 133ms total, 31ms redis, 112ms daemon RPC
2017-04-04 21:19:30 [Switching] [Setup] (Thread 1) Loading last proxy state from redis
2017-04-04 21:19:30 [Pool] [zcash] (Thread 1) Share processing setup with redis (127.0.0.1:6379)
/home/pool/z-nomp/node_modules/bs58check/index.js:48
if (!payload) throw new Error('Invalid checksum')
^

Error: Invalid checksum
at Object.decode (/home/pool/z-nomp/node_modules/bs58check/index.js:48:23)
at Object.fromBase58Check (/home/pool/z-nomp/node_modules/bitcoinjs-lib-zcash/src/address.js:8:27)
at Object.exports.createGeneration (/home/pool/z-nomp/node_modules/stratum-pool/lib/transactions.js:87:46)
at new BlockTemplate (/home/pool/z-nomp/node_modules/stratum-pool/lib/blockTemplate.js:43:35)
at JobManager.processTemplate (/home/pool/z-nomp/node_modules/stratum-pool/lib/jobManager.js:123:32)
at /home/pool/z-nomp/node_modules/stratum-pool/lib/pool.js:578:66
at itemFinished (/home/pool/z-nomp/node_modules/stratum-pool/lib/daemon.js:155:36)
at /home/pool/z-nomp/node_modules/stratum-pool/lib/daemon.js:169:17
at parseJson (/home/pool/z-nomp/node_modules/stratum-pool/lib/daemon.js:85:17)
at IncomingMessage. (/home/pool/z-nomp/node_modules/stratum-pool/lib/daemon.js:95:17)
2017-04-04 21:19:31 [Master] [PoolSpawner] Fork 0 died, spawning replacement worker...

nobody knows ? i have no idea what is bad