Error when using with ftps

[freeit]

When sending a file from the filemanager to my ftps server (vsftpd) I'll get an error "Error parsing userId". I have attached you the relevant log output from "adb logcat".
Uploading ftp_applet.txt…

It seems my file attachment doesn't work. So please have a look at:
https://paste.kde.org/pvrdytgbq

The ftps URL I used:
ftps://user:[email protected]:12345/

I'm using "Send With FTP" version 1.2.2 from F-Droid on a SAMSUNG S4 mini with CyanogenMOD snapshot version 13.0-20160418