Arduino portenta h7 error

Hello do anyone knows how to resolve this problem , im trying to upload my code to an arduino portenta h7 from arduino ide 1.8.15 , but i cant find any solution

Arduino: 1.8.15 (Windows 10), Board: "Arduino Portenta H7 (M7 core)"

Sketch uses 293312 bytes (37%) of program storage space. Maximum is 786432 bytes.

Global variables use 76232 bytes (14%) of dynamic memory, leaving 447392 bytes for local variables. Maximum is 523624 bytes.

dfu-util 0.10-dev

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/

Warning: Invalid DFU suffix signature

A valid DFU suffix will be required in a future dfu-util release

Cannot open DFU device 2341:035b found on devnum 1 (LIBUSB_ERROR_NOT_FOUND)

No DFU capable USB device available

the selected serial port No DFU capable USB device available

does not exist or your board is not connected

@pichy, your topic was moved to a more suitable section of the forum.

Try double push button on board. LED should then pulsate, now try upload again.