TypeError when npm run serve

[kelvinkuo]

• I'm submitting a ...

  • [ ] bug report

• What is the current behavior? npm run serve will print error msg as below

  
  $ npm run serve                                                                                                                                                                                                          
  > vuestic-admin@2.0.0 serve /Users/kelvin/work/xiaozhu/ab-testing/admin/xz_abtest_admin_vuestic
  > vue-cli-service serve
  
  ERROR  TypeError: Function.prototype.toString requires that 'this' be a Function
  TypeError: Function.prototype.toString requires that 'this' be a Function
  at Proxy.toString (<anonymous>)
  at foldValue (/Users/kelvin/work/xiaozhu/ab-testing/admin/xz_abtest_admin_vuestic/node_modules/hash-sum/hash-sum.js:47:27)
  at foldKey (/Users/kelvin/work/xiaozhu/ab-testing/admin/xz_abtest_admin_vuestic/node_modules/hash-sum/hash-sum.js:28:12)
  at Array.reduce (<anonymous>)
  at foldObject (/Users/kelvin/work/xiaozhu/ab-testing/admin/xz_abtest_admin_vuestic/node_modules/hash-sum/hash-sum.js:26:32)
  at foldValue (/Users/kelvin/work/xiaozhu/ab-testing/admin/xz_abtest_admin_vuestic/node_modules/hash-sum/hash-sum.js:45:12)
  at foldKey (/Users/kelvin/work/xiaozhu/ab-testing/admin/xz_abtest_admin_vuestic/node_modules/hash-sum/hash-sum.js:28:12)
  at Array.reduce (<anonymous>)
  at foldObject (/Users/kelvin/work/xiaozhu/ab-testing/admin/xz_abtest_admin_vuestic/node_modules/hash-sum/hash-sum.js:26:32)
  at foldValue (/Users/kelvin/work/xiaozhu/ab-testing/admin/xz_abtest_admin_vuestic/node_modules/hash-sum/hash-sum.js:45:12)
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! vuestic-admin@2.0.0 serve: `vue-cli-service serve`
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the vuestic-admin@2.0.0 serve script.
  npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in: npm ERR! /Users/kelvin/.npm/_logs/2020-03-20T02_16_15_015Z-debug.log

* **If the current behavior is a bug, please provide the steps to reproduce, ideally also a screenshot or gif if it's a style issue**
just git clone and npm install then npm run serve

* **What is the expected behavior?**
no error

[skapin]

:skull_and_crossbones: still waiting