#198 Warning: Invalid DFU suffix signature

[Fabio]

I need help.. I don't know how fix this error:

Warning: Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release
No DFU capable USB device available
Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2021 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/

Failed uploading: uploading error: exit status 74

[Tormod Volden]

The warning that you put in the title is just a warning. It has nothing to do with "No DFU capable USB device available". Did you at all read https://sourceforge.net/p/dfu-util/tickets/new/ ?