Sometimes when you are using apps and they have a shortcut to go back to homebrew and homebrew is not installed it will give you a boot screen. This one though is a memory access exception. It might be trying to write to a write protected memory card.
I'm not using homebrew, the wii isn't modded in any way (software or chip) and it was a genuine game (starwars clone wars republic heroes). No memory card is inserted and there is plenty of space left on internal memory. I just hope it isn't some kind of hardware corruption
The wii has been known to do that every now and then mine has done is like 3 times already before i modded it.