Hello!
I faced a problem with files with cyrillic, chinese, japanese and thai letters in filenames.
Chromium fails to attach them because they have zero size and no name, Libre Office fails to open them because he can't find ?????.odt file, as he says, FileZilla refuses to show them in files list because LC_CTYPE is not set.

This happend on Debian 10.1 and latest Neon 5.17.2 both 64-bit

How to fix it?

Where do those files come from? It sounds like they come from an external disk, pen drive or partition that was not mounted with the right character encoding.

Problem solved.
Locale was set incorrectly.
It happens that if you select Russian language when installing Neon - locale is set ok. But if you install with English lang and later add Russian you have to manually generate locales.

efkz wrote:Hello!
I faced a problem with files with cyrillic, japanese and thai and chinese language characters in filenames.
Chromium fails to attach them because they have zero size and no name, Libre Office fails to open them because he can't find ?????.odt file, as he says, FileZilla refuses to show them in files list because LC_CTYPE is not set.

This happend on Debian 10.1 and latest Neon 5.17.2 both 64-bit

How to fix it?

Good to see that you had got the problem sorted out, and thanks for sharing your solution. It helped me as well.