Fresh Install with grdrive empty (local and google) no upload : Can't upload file parent folder not found on Drive

Hello,
I just made an insync fresh (kubuntu 14.04 up-to-date), install with empty folder on PC and cleaned Drive at google.
I put files with subdirectories in local insync folder and I got this error for all files on upload for all files :

Can’t upload file parent folder not found on Drive .

Help please .

@Damien_Vigneron Please send your logs to support@insynchq.com for investigation: How to find the log files. You can compress them before sending to save space.