Another problem was raised by upgrading the version of node.js in this pull request.
bookstore-UploadBooks that is Custom::CustomResource outputs the following error:
"errorType": "Runtime.ImportModuleError",
"errorMessage": "Error: Cannot find module 'uuid'",
"stack": [
"Runtime.ImportModuleError: Error: Cannot find module 'uuid'",
" at _loadUserApp (/var/runtime/UserFunction.js:100:13)",
" at Object.module.exports.load (/var/runtime/UserFunction.js:140:17)",
" at Object.<anonymous> (/var/runtime/index.js:45:30)",
" at Module._compile (internal/modules/cjs/loader.js:778:30)",
" at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)",
" 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 Function.Module.runMain (internal/modules/cjs/loader.js:831:12)",
" at startup (internal/bootstrap/node.js:283:19)"
]
It looks like you are experiencing the issues described on this page.