Cant come out of bootloader mode

I'm getting this error as bellow

Sketch uses 11452 bytes (4%) of program storage space. Maximum is 262144 bytes.
Global variables use 3560 bytes (10%) of dynamic memory, leaving 29208 bytes for local variables. Maximum is 32768 bytes.
Performing 1200-bps touch reset on serial port /dev/ttyACM0
Waiting for upload port...
No upload port found, using address:"/dev/ttyACM0"  label:"/dev/ttyACM0"  protocol:"serial"  protocol_label:"Serial Port (USB)"  properties:{key:"pid"  value:"0x0057"}  properties:{key:"serialNumber"  value:""}  properties:{key:"vid"  value:"0x2341"} as fallback
No device found on ttyACM0
"/home/mozammel/.arduino15/packages/arduino/tools/bossac/1.7.0-arduino3/bossac" -i -d --port=ttyACM0 -U true -i -e -w -v "/tmp/arduino-sketch-FB6B19F6B02D100CF7855C3DE69E7B1A/blink.ino.bin" -R
Failed uploading: uploading error: exit status 1

The NANO 33 IoT always in bootloader mode. The orange LED always pulsating.
looking for help to fix it.

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