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This error is related to Secure Boot and the UEFI system's storage, specifically the EFI partition, being full. To resolve this, you can try the following steps:

1. Disable Secure Boot:
   - Restart your system and enter the BIOS/UEFI setup by pressing a specific key (e.g., `F2`, `Delete`, or `Esc`) during boot.
   - Look for the **Secure Boot** option and disable it.
   - Save the settings and exit.

2. Wipe the EFI Partition:
   - Boot from the Ubuntu installation media (Live USB).
   - Open a terminal in the live session by pressing `Ctrl + Alt + T`.
   - Use the `GParted` partition manager to manage the partitions:
     - Find the EFI partition, usually formatted as `FAT32` and around 100-512 MB in size.
     - Unmount the EFI partition if it is mounted.
     - Reformat the EFI partition as `FAT32`.
     - Alternatively, delete the partition and recreate it as `FAT32`.

3. Re-attempt Installation:
   - After fixing the EFI partition, reattempt the installation of Ubuntu. Make sure that the installer is pointed to the correct EFI partition.

If you're still having issues, there may be other problems related to the motherboard's UEFI implementation or a conflict with dual-boot systems.