zigbee2mqtt logs 1.6.0 with 20190608

> [email protected] start /opt/zigbee2mqtt.bak.bak
> node index.js

  zigbee2mqtt:info 9/15/2019, 3:18:44 PM Logging to directory: '/var/log/zigbee2mqtt'
  zigbee2mqtt:info 9/15/2019, 3:18:44 PM Starting zigbee2mqtt version 1.6.0 (commit #e26ad2a)
  zigbee2mqtt:info 9/15/2019, 3:18:44 PM Starting zigbee-shepherd
  zigbee2mqtt:info 9/15/2019, 3:18:51 PM Error while starting zigbee-shepherd, attempting to fix... (takes 60 seconds) (Error: Cluster with key '64527' does not exist)
  zigbee2mqtt:info 9/15/2019, 3:19:51 PM Starting zigbee-shepherd
  zigbee2mqtt:error 9/15/2019, 3:20:04 PM Error while starting zigbee-shepherd! (Error: SRSP - SYS - osalNvRead after 6000ms)
  zigbee2mqtt:error 9/15/2019, 3:20:04 PM Press the reset button on the stick (the one closest to the USB) and start again
  zigbee2mqtt:error 9/15/2019, 3:20:04 PM Failed to start
        {"message":"SRSP - SYS - osalNvRead after 6000ms","stack":"Error: SRSP - SYS - osalNvRead after 6000ms\n    at Timeout.object.timer.setTimeout [as _onTimeout] (/opt/zigbee2mqtt.bak.bak/node_modules/zigbee-herdsman/dist/znp/znp.js:227:24)\n    at ontimeout (timers.js:436:11)\n    at tryOnTimeout (timers.js:300:5)\n    at listOnTimeout (timers.js:263:5)\n    at Timer.processTimers (timers.js:223:10)"}
  zigbee2mqtt:error 9/15/2019, 3:20:04 PM Exiting...
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] start: `node index.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.