Functions deployment error: Unexpected token › in JSON at position 0

I am trying to deploy two Functions that are a component of an app in the App Platform. I keep getting this error:

[2023-09-22 22:33:41] │ Failures:
[2023-09-22 22:33:41] │  ›   Error: While deploying 'get-leaderboard-entries' (running remote build): 
[2023-09-22 22:33:41] │  ›   Unexpected token › in JSON at position 0
[2023-09-22 22:33:41] │  ›   Error: While deploying 'save-new-top-time' (running remote build): 
[2023-09-22 22:33:41] │  ›   Unexpected token › in JSON at position 0
[2023-09-22 22:33:42] │ 
[2023-09-22 22:33:42] │ command exited with code 1
[2023-09-22 22:33:42] │ 
[2023-09-22 22:33:42] │  ✘ build failed

I have cleared the top level directory of the Functions project so all that is left is:

• /lib/
• /packages/
• /.gitignore
• /project.yml

I have a build.sh under /lib/ and for both Functions under /packages/ . Each build.sh basically does

npm install
npm run build

All package.json and tsconfig.json files don’t seem to have any invalid syntax.

Running doctl sls deploy --remote-build works though.