Loading a QVD file from a SFTP connector (not from webconnector) occurs an error: noFileSize

Any file format doesn't have an error when loading.
I tried to load with an other QVD, the same issue persist.

Antivirus doesn't scan the SFTP folder.
There is not file access restrictions, antivirus software locking the file, or resource bottlenecks

Any idea to fix it?