Help for my error?

Hello, I meet some mistakes with my Blueprint:

More precisely:

89000-p1.png

And so my mistakes:

Thank you in advance !!!

RUBEN AND GOOGLE TRADUCTION.

My Character is null, it cause “Game Hu D Widjet” (maybe that a null) get node to fail and as result ADD note fails as it can’t get array. MAke sure that My Character is always set, you can also do check if MyCharacter is valid