uploadFile function

[ronakvpanchal]

This function is using the fs.existsSync to check if a file exists locally on the system which is deprecated and usually returns false if there is no permission to access the file.

Even though the file exists this will not find the file and hence the upload fails on the system.

[icfantv]

Probably because this is dated from 2017, fs.existsSync is ok to use and fs.exists is deprecated: https://nodejs.org/api/fs.html#fs_fs_existssync_path