Is there a work around to solve this problem. I have seen that installing Ubuntu 20.04 on the NUC is fairly straightforward.
Since several other problems will occur concerning the NVIDIA driver after you solve this ACPI error (took me two days to find the way out), I will provide my complete solution.
Instead of installing Ubuntu, select try Unbuntu without installing, and push E.
Replace the "---" after splash with "nomodeset", and push F10. This step will solve the ACPI error.
Download the drivers in the following link: https://www.nvidia.com/download/driverResults.aspx/179599/en-us Install the .run file (before the installation, you need to install gcc first)
Do NOT restart the computer as recommended, otherwise, you will get a black screen and have to start from the first step again. Push the install Ubuntu 18.04 icon and start installing the OS to your Nuc. Remember to select installing the 3rd-party software.
I wish it works for you.