run create-userproxy error

[jaysongforever]

i used npm, but it when i used npm run create-userproxy, it make an error,thats my error info:
npx buidler test demo/Part-1_Gelato_User/step1-create-user-proxy.js

(node:33724) Warning: Accessing non-existent property 'INVALID_ALT_NUMBER' of module exports inside circular dependency
(Use node --trace-warnings ... to show where the warning was created)
(node:33724) Warning: Accessing non-existent property 'INVALID_ALT_NUMBER' of module exports inside circular dependency
Compiling...
Error BDLR502: Couldn't download compiler versions list. Please check your connection or use local version 0.6.8

For more info go to https://buidler.dev/BDLR502 or run Buidler with --show-stack-traces
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! gelato-kyber@0.0.1 create-userproxy: npx buidler test demo/Part-1_Gelato_User/step1-create-user-proxy.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the gelato-kyber@0.0.1 create-userproxy script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

anybody who can help me, plz