Layer0 for Traditional Sites Errors

Following these instructions Layer0 Documentation - Layer0 for Traditional Sites and running the following commands

npm i -g @layer0/cli
npm create layer0-app@latest
cd l0trad
layer0 dev

produces the following error output

Starting Layer0 in development mode with caching disabled…
WARNING in DefinePlugin
Conflicting values for ‘process.env.NODE_ENV’
ERROR in ./src/browser.ts
Module build failed (from ./node_modules/ts-loader/index.js):
Error: Could not load TypeScript. Try installing with yarn add typescript or npm install typescript. If TypeScript is installed globally, try using yarn link typescript or npm link typescript.
at Object.loader (/Users/howard.ross/Repos/l0trad/node_modules/ts-loader/dist/index.js:18:18)

ERROR in ./src/service-worker.ts
Module build failed (from ./node_modules/ts-loader/index.js):
Error: Could not load TypeScript. Try installing with `yarn add typescript` or `npm install typescript`. If TypeScript is installed globally, try using `yarn link typescript` or `npm link typescript`.
    at Object.loader (/Users/howard.ross/Repos/l0trad/node_modules/ts-loader/dist/index.js:18:18)

webpack compiled with 2 errors and 1 warning
ERROR in ./src/shoppingFlowRouteHandler.ts 5:13
Module parse failed: Unexpected token (5:13)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
| import { injectBrowserScript } from '@layer0/starter'
|

const handler: RouteHandler = async ({ cache, removeUpstreamResponseHeader, proxy }) => {
| cache(CACHE_PAGES)
| removeUpstreamResponseHeader(‘set-cookie’) // The presence of a set-cookie header would prevent the response from being cached, so ensure set-cookie headers are removed.

webpack compiled with 1 error
error Error: Module parse failed: Unexpected token (5:13)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
| import { injectBrowserScript } from '@layer0/starter

const handler: RouteHandler = async ({ cache, removeUpstreamResponseHeader, proxy }) => {
| cache(CACHE_PAGES)
| removeUpstreamResponseHeader(‘set-cookie’) // The presence of a set-cookie header would prevent the response from being cached, so ensure set-cookie headers are removed.
at Object…/src/shoppingFlowRouteHandler.ts (/Users/howard.ross/Repos/l0trad/.layer0/lambda/routes.js:32457:7)
at webpack_require (/Users/howard.ross/Repos/l0trad/.layer0/lambda/routes.js:32624:42)
at /Users/howard.ross/Repos/l0trad/.layer0/lambda/routes.js:32699:83
at /Users/howard.ross/Repos/l0trad/.layer0/lambda/routes.js:32722:3
at /Users/howard.ross/Repos/l0trad/.layer0/lambda/routes.js:32725:12
at webpackUniversalModuleDefinition (/Users/howard.ross/Repos/l0trad/.layer0/lambda/routes.js:3:20)
at Object. (/Users/howard.ross/Repos/l0trad/.layer0/lambda/routes.js:10:3)
at Module._compile (internal/modules/cjs/loader.js:1137:30)
at Object.Module._extensions…js (internal/modules/cjs/loader.js:1157:10)
at Module.load (internal/modules/cjs/loader.js:985:32)

npm install typescript resolves this and produces the following output:

npm notice save typescript is being moved from devDependencies to dependencies
npm WARN Invalid name: "l0 trad"
npm WARN babel-loader@8.2.2 requires a peer of @babel/core@^7.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN l0trad No description
npm WARN l0trad No repository field.
npm WARN l0trad No README data
npm WARN l0trad No license field.

+ typescript@4.2.4
added 1 package from 1 contributor and audited 884 packages in 11.528s

50 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities

Looks like maybe npm randomly failed to install typescript even though it was a devDependency. Probably running npm install a second time would fix it.