Due to a problem in the Intel® Quartus® Prime Standard Edition software version 20.1 and earlier, you may not be able to choose the 1.0V IO standard for 10M02/04/08/16 SAU324C8G Intel® MAX® 10 devices.
To work around this problem, download and install the Intel® Quartus® Prime Standard Edition software version 20.1 patch 0.11 from the appropriate link below. After installing the patch, follow the steps provided in the readme files.
Download patch quartus-20.1std-0.11std-windows.exe for Windows (.exe)
Download patch quartus-20.1std-0.11std-linux.run for Linux (.run)
Download the Readme for patch quartus-20.1std-0.11std-readme.txt (.txt)