Is it normal that i can't load m'y save after installing 2.3?
Yes, saves from previous versions will not work on the revamped version of MCS (v0.2.3), you can find two safe files that DO work in v0.2.3 in this post.
Yes, saves from previous versions will not work on the revamped version of MCS (v0.2.3), you can find two safe files that DO work in v0.2.3 in this post.