'Launching a Hello World Nios II Hardware configuration' has encountered a problem.

The first error is probably caused because you have included both the .qsys and .qip files in your quartus project. Use one or the other. If you use the .qsys file, the code for the qsys project is regenerated every time you compile your project in quartus. It is recommended when you are updating the qsys project often. If you use the .qip file, you need to remember to regenerate in qsys when needed, but your compilation doesn't spend the extra time generating qsys.

The second error is probably caused because the instatiation of the qsys generated module in your .v file doesn't match the component created by qsys. Note that if you have nothing else, you can just make the qip or qsys file the top level in the project and forget about the .v file entirely.