Not find ../../build/contracts/MTTPToken.json

[bluecloudmatrix]

When I run the server, it reminds me

ERROR in ./app/javascripts/app.js
Module not found: Error: Can't resolve '../../build/contracts/MTTPToken.json' in '/root/qiushan/root/ico/app/javascripts'
@ ./app/javascripts/app.js 9:0-65
@ multi (webpack)-dev-server/client?http://localhost:8080 ./app/javascripts/app.js
webpack: Failed to compile.