I tried to open my project from 2018.1.0f1 in 2018.2.0f1 and i got many errors
As i know in this version unity changed something with multiplayer and scripts is now dead
is there a way to fix this not by changing every script?
like change c# compiler to old verison or something else
In a word.
Nope.
This kind of thing is why its advisable to stick to a version of Unity for the lifetime of a project unless absolutely necessary. There might be some semi-automated migration tools somewhere on the depths of the internet but your milage will vary as to how useful it would even be.
