Error message during boot

[vcespon]

I'll add here other errors I have seen:

If you end in GRUB prompt, this happens on old computers with BIOS, not UEFI. There's a limitation of 136 GB for the boot volume.
This is documented on ventoy guide and there's an option to leave space unused on the USB device, so the ventoy partition is smaller.

If you get a blue screen with “Invalid Signature Detected”, this is due to Secure boot.
There's an option to load a key from disk. Select the one on the VTOYEFI partition.
Also, try to load default keys on Secure Boot settings, then add the one on the USB device.

If you get this:
Could not create MokListRT: Volume full
Could not create MokListXRT: Volume full
Could not create SbatlevelRT: Volume full
Could not create MokListTrustedRT: Volume full
Something has gone seriously wrong: import_mok_state() failed : volume full

It is related to the TPM. It started happening to me after a few months and I found that disabling the TPM on UEFI lets me boot from USB again
Tried to reset the UEFI to defaults, clear the TPM contents.... nothing
Finally used CLEAR CMOS jumper on the motherboard and now I can boot with TPM and Secure boot enabled.