Cannot save/upload files to directories whose name contains special characters

[MatthiasGLB]

Description of the Issue

When a directory on the server contains a special character, it is not possible to save any file in it. For example: "français". This is a long-standing issue and I wonder why it isn't fixed yet. I need to keep that special character. Is there any solution?

Steps to Reproduce the Issue

1. Open a file located in directory whose name contains a special character
2. Try to save the file

Expected Behavior

file should be saved to server

Actual Behavior

Error message and file not saved: "Upload of .... franￃﾧais\translations_lang.php failed"

Debug Information

Notepad++ v7.8.5 (64-bit) Build time : Mar 4 2020 - 11:08:34 Path : C:\Program Files\Notepad++\notepad++.exe Admin mode : OFF Local Conf mode : OFF OS Name : Windows 10 Pro (64-bit) OS Version : 1909 OS Build : 18363.592 Plugins : mimeTools.dll NppConverter.dll NppExport.dll NppFTP.dll

0.29.5

SFTP