problem on reading text files or JSON from SDCard "quest 2"

hello 

i hope you are doing well 

i trying to read images and text files from local storage. 

it reads the images but cannot read text files or any other type of files "Note: it works on editor but on headset don't work."

here is the files on the directory on headset.

 the result on headset

the result on editor

i don't know what the problem is, it was working well and suddenly it stop works.