Bootloader error grub minimal bash "load the kernel first" after installing my live image via calamares installer

[Sakkra Billa <sakkrabilla@gmail.com>]

I followed the tutorial from: https://www.willhaley.com/blog/custom-debian-live-environment/ to make a live custom debian 12 image. In order to install it on my VM I installed calamares, calamares-settings-debian and rsync . The live image works perfectly and the installation also finishes without errors but when i reboot my VM into the installed environment, it boots into grub minimal bash line editing mode. On typing boot it says "load the kernel first". I did not change any of the calamares settings everything is default. Please guide me that where did i go wrong.