I develop a game that reads, constantly, multiple datasets from a subfolder in the Assets/Resources folder of Unity.

While in the development mode the game works fine, when I build the game (I tried in all platforms - Mac OS, Windows x 86_64, Windows 86, WebGL) it seems that it cannot read the CSV files from the resource folder and does not behave as expected. The size of the Resources file is not large (7MB).

Is there any restriction in loading files from the Resources folder in build mode?

I load the CSVs with Resources.Load<TextAsset>("folder/" + dataset);