Today not update code ESP32 CAM MB

[Basuso]

Hi,
I'm using ESP32CAM with ESP32 CAM MB, I'm using this objects for many months without problem, but from Yestwrday, if I try to upload code, Arduino IDE print this:

Sketch uses 281529 bytes (8%) of program storage space. Maximum is 3145728 bytes.
Global variables use 21480 bytes (6%) of dynamic memory, leaving 306200 bytes for local variables. Maximum is 327680 bytes.
esptool.py v4.5.1
Serial port COM3
Connecting......................................

A fatal error occurred: Failed to connect to ESP32: Wrong boot mode detected (0xb)! The chip needs to be in download mode.
For troubleshooting steps visit: https://docs.espressif.com/projects/esp ... oting.html
Failed uploading: uploading error: exit status 2

I'm very confused, I used this form many time, link with different sensor and Wifi device, take picture and update to web server, but from Yesterday is impossibile to upload code.
I changed USB wire, different ESP32CAM, different ESP32CAMMB, different pc, but nothing to do!!
I've read many document on internet, try to comunicate with esptool, with esptool online, but nothing to do!
Can someone give mi a light in this night?
Many thanks.
Alessio