Hi,
I have installed device support file and try again.
"Must assign a valid Device for Altera Onchip Flash megafunction." message is disappeared,
and I got another error messages

as follows.
Info: [TE_SDK-10] Create app -> done
------------------------------
Info: [TE_SDK-23] Modify sdk files. Please wait ...
Error: [TE_DES-64] Script (TE::SDK::modify_sdk_files) failed: couldn't open "C:/********/project/test_board/software/test_board/Makefile": no such file or directory
Error: [TE_DES-31] Script (TE::DES::run_sw_project) failed:
Error: [TE_TK-11] (TE) Script (TE::DES::run_project) failed: .
Info: [TE_DES-62] 'Create Project' GUI closed.
I find that there is no "Makefile" on my workspace "C:/********/project/test_board/software/test_board/"
and "TEI0001-test_board-quartus_19.1.0-20200707153205.zip" doesn't contain "Makefile".
Could you give me some advice about this problem?
Thanks.