what is not right exactly?

You want to put a document called logger inside a folder called core which is inside a bigger folder called src.

So it should look like:

📁 src

📁 core

📄 logger.js

We told GitHub “put this file at src/core/logger.js”

On a computer GitHub understands that perfectly and builds the right folders automatically.

But on a phone browser — GitHub got confused. Instead of reading the path correctly it treated src/core as one single folder name. So it built this instead:

📁 src

📁 src/core ← wrong, folder named "src/core"

📄 logger.js

📄 index.js

So the app crashed because when it went looking for the logger file it looked in src/core/logger.js but the file was actually buried inside src/src/core/logger.js.