I cant mine with gpu and cpu

GPU:Nvidia Geforce GT 730 2gb vram
CPU:Intel pentium G4560 4gb ram

Indeed, that is normal…
2GB VRAM GPUs don’t match the criteria, because it just doesn’t have enough VRAM to run.
4GB RAM is too low to mine on CPU… Even though 4GB is enough, this would be free RAM, but in your case it’s total, meaning your system will already take some of that, leaving you with less than 4GB.

Sorry, but you won’t be able to mine.