Hi @efe373,
Thank you for posting in Intel community forum, hope this message find you well and apologies for the delayed in response.
Please find the clarification to your question here, 3) Hardware are not required to run the emulation, but please ensure that the command are run with a emulation stated, please do try to installed the board bsp again with the board connected to the host. 4) If just to run the emulation I think this should be good to ignore. 5) Usually it will be the path opencl are installed, in windows cases example it would be the following (i.e. C:\intelFPGA_pro\20.2\hld\windows64\lib) 6) I am suspecting there might be some missed in setup, by default the it should be added automatically. 7) Suspecting that the error are cause by some changes in the hello world example code, can you please try to recompile with the original code with emulator command.
Please do let us know if that helps to clarify you doubts.
Best Wishes
BB