The sample can not work

[tiandiyiqi]

I have ran these command:
npm install dat-registry-api --save
npm install express --save

When I run the sapmle, It show errors:

throw err
^

Error: Could not locate the bindings file. Tried:
→ D:\Desktop\Mirror\FH\cloudTalk\dat-registry-test\node_modules_leveldown@1.7.2@leveldown\build\leveldown.node
→ D:\Desktop\Mirror\FH\cloudTalk\dat-registry-test\node_modules_leveldown@1.7.2@leveldown\build\Debug\leveldown.node
→ D:\Desktop\Mirror\FH\cloudTalk\dat-registry-test\node_modules_leveldown@1.7.2@leveldown\build\Release\leveldown.node
→ D:\Desktop\Mirror\FH\cloudTalk\dat-registry-test\node_modules_leveldown@1.7.2@leveldown\out\Debug\leveldown.node
→ D:\Desktop\Mirror\FH\cloudTalk\dat-registry-test\node_modules_leveldown@1.7.2@leveldown\Debug\leveldown.node
→ D:\Desktop\Mirror\FH\cloudTalk\dat-registry-test\node_modules_leveldown@1.7.2@leveldown\out\Release\leveldown.node
→ D:\Desktop\Mirror\FH\cloudTalk\dat-registry-test\node_modules_leveldown@1.7.2@leveldown\Release\leveldown.node
→ D:\Desktop\Mirror\FH\cloudTalk\dat-registry-test\node_modules_leveldown@1.7.2@leveldown\build\default\leveldown.node
→ D:\Desktop\Mirror\FH\cloudTalk\dat-registry-test\node_modules_leveldown@1.7.2@leveldown\compiled\10.16.0\win32\x64\leveldown.node
at bindings (D:\Desktop\Mirror\FH\cloudTalk\dat-registry-test\node_modules_bindings@1.2.1@bindings\bindings.js:88:9)
at Object. (D:\Desktop\Mirror\FH\cloudTalk\dat-registry-test\node_modules_leveldown@1.7.2@leveldown\leveldown.js:4:46)
at Module._compile (internal/modules/cjs/loader.js:776:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Module.require (internal/modules/cjs/loader.js:690:17)
at require (internal/modules/cjs/helpers.js:25:18)
at Object. (D:\Desktop\Mirror\FH\cloudTalk\dat-registry-test\node_modules_level@1.7.0@level\level.js:1:44)