Troubleshooting dolphin ftp

with ftp -n I can connect to a server but dolphin won´t let me. How can I troubleshoot dolphin ftp connect?

First share some information.

What is your system (its version, kinfo command).

What did you try ? What message did it give you ?

Connecting to ftp with dolphin, should consist in typing a url to ftp://my-server in the location field.

Try again launching dolphin from the command line it might output valuable information.

Thanks. First I want to see what communication dolphin did so I can help you answer your questions. How do I get a log from the communication flow between dolphin and ftp server?

To answer your question: there is no message. That is why I need access to the ftp log.

Tell me honestly how this can help:

Operating System: Fedora Linux 44
KDE Plasma Version: 6.7.3
KDE Frameworks Version: 6.28.0
Qt Version: 6.11.1
Kernel Version: 7.1.5-201.fc44.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-7700K CPU @ 4.20GHz
Memory: 16 GiB of RAM (15.6 GiB usable)
Graphics Processor: Quadro RTX 4000
Manufacturer: Gigabyte Technology Co., Ltd.
Product Name: Z170X-Gaming 7

That is a bit more advanced, you can check in terminal (or redirect it to file to easily share) with:

QT_LOGGING_RULES="kf.kio.workers.ftp.debug=true" dolphin