Build Error

[bamsom]

Hello, a complete newbie here. After 'npm build' I got

0 info it worked if it ends with ok
1 verbose cli [ '/usr/local/Cellar/node/11.7.0/bin/node',
1 verbose cli '/usr/local/bin/npm',
1 verbose cli 'run',
1 verbose cli 'build' ]
2 info using npm@6.5.0
3 info using node@v11.7.0
4 verbose run-script [ 'prebuild', 'build', 'postbuild' ]
5 info lifecycle reason-react-example@0.0.0prebuild: reason-react-example@0.0.0
6 info lifecycle reason-react-example@0.0.0build: reason-react-example@0.0.0
7 verbose lifecycle reason-react-example@0.0.0build: unsafe-perm in lifecycle true
8 verbose lifecycle reason-react-example@0.0.0build: PATH: /usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/Users/s-yyoon/Dropbox/NN/JS TS Prac/ReasonML/reason-react-example/node_modules/.bin:/Users/s-yyoon/Dropbox/GCP/google-cloud-sdk/bin:/Users/s-yyoon/miniconda2/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin:/Library/Frameworks/Mono.framework/Versions/Current/Commands
9 verbose lifecycle reason-react-example@0.0.0build: CWD: /Users/s-yyoon/Dropbox/NN/JS TS Prac/ReasonML/reason-react-example
10 silly lifecycle reason-react-example@0.0.0build: Args: [ '-c', 'bsb -make-world' ]
11 silly lifecycle reason-react-example@0.0.0build: Returned: code: 2 signal: null
12 info lifecycle reason-react-example@0.0.0build: Failed to exec build script
13 verbose stack Error: reason-react-example@0.0.0 build: bsb -make-world
13 verbose stack Exit status 2
13 verbose stack at EventEmitter. (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:301:16)
13 verbose stack at EventEmitter.emit (events.js:188:13)
13 verbose stack at ChildProcess. (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
13 verbose stack at ChildProcess.emit (events.js:188:13)
13 verbose stack at maybeClose (internal/child_process.js:978:16)
13 verbose stack at Process.ChildProcess._handle.onexit (internal/child_process.js:265:5)
14 verbose pkgid reason-react-example@0.0.0
15 verbose cwd /Users/s-yyoon/Dropbox/NN/JS TS Prac/ReasonML/reason-react-example
16 verbose Darwin 18.2.0
17 verbose argv "/usr/local/Cellar/node/11.7.0/bin/node" "/usr/local/bin/npm" "run" "build"
18 verbose node v11.7.0
19 verbose npm v6.5.0
20 error code ELIFECYCLE
21 error errno 2
22 error reason-react-example@0.0.0 build: bsb -make-world
22 error Exit status 2
23 error Failed at the reason-react-example@0.0.0 build script.
23 error This is probably not a problem with npm. There is likely additional logging output above.
24 verbose exit [ 2, true ]