I get the following error when compiling the build in Quartus:
Error (204012): Can't generate netlist output files because the file "/home/tugdual/Documents/EPFL/RTES/nios_introduction/hw/quartus/db/ip/soc_system/submodules/soc_system_nios2_gen2_0_cpu.v" is an OpenCore Plus time-limited file. Remove the unlicensed cores or obtain a license for those OpenCore Plus time-limited IP cores used in the design.
It would seem that the project structure contains a file that has an expired licence, would be possible?