# Raspberry PI4 8gb error after update =\> grub rescue

**URL:** https://discuss.freedombox.org/t/raspberry-pi4-8gb-error-after-update-grub-rescue/1641
**Category:** Support
**Created:** [July 30, 2021, 1:38pm UTC](https://discuss.freedombox.org/t/raspberry-pi4-8gb-error-after-update-grub-rescue/1641 "2021-07-30T13:38:10Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![eboelens](https://discuss.freedombox.org/letter_avatar_proxy/v4/letter/e/bb73d2/32.png) [@eboelens](https://discuss.freedombox.org/u/eboelens)
#### Post date: [July 30, 2021, 1:38pm UTC](https://discuss.freedombox.org/t/raspberry-pi4-8gb-error-after-update-grub-rescue/1641/1 "2021-07-30T13:38:10Z")

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Hello I already installed 3x freedombox on a Raspberry Pi 4 Model B 8gb according to the instructions with the EUFI firmware on a sdcard and freedombox on an bootable ssd via usb connection.  
At the first boot everything works (rainbow screen) freedombox is running. I will update freedombox to the latest version.  
The update is successful.  
Then I do a reboot.  
After reboot I get an error:  
symbol ‘grub\_is\_lockdown’ not found  
grub rescue\>

I did some research but to no avail  
grubrescue\> ls (gives me some output)  
… (hd0,gpt2)…  
grubrescue\> ls (hd0,gpt2)/ (gives me all the files/maps like /boot …)

i saw solutions at grub\> but not at grub rescue

what happens here ?