Ref: https://askubuntu.com/questions/886536/how-to-install-ubuntu-on-an-acer-with-preinstalled-windows-10-home

Detailed steps I used to successfully install:

Create a boot USB with the Ubuntu image file using Rufus as detailed here:https://www.ubuntu.com/download/desktop/create-a-usb-stick-on-windows

Insert USB in the forward left hand side USB connector (the USB connector on the right side of the computer will not work)

Reboot the computer and access the BIOS with F2:

• Use arrow keys to navigate to BOOT screen
• Select Secure Boot and change value to disable
• On the Boot priority order move USB-HDD to the top
• F10 to save and exit

Proceed with the installation type of choice.

After the installation has completed, and is prompting you to restart:

• Remove the USB drive
• (on reboot) Access the BIOS again with F2
• On the BIOS page Select an UEFI file as trusted for executing
• Navigate to: HDD0 > EFI > 'ubuntu' and select SHIMX64.EFI (Enter shimx64 as name)
• Navigate to the BOOT tab:
• Select Secure boot, change value to Enabled
• F10 to save and exit

I followed these exact steps, installed without errors, and am using Ubuntu on my Acer V3 now.