csc.exe has stopped working ,csc.exe has stoped working

so i just tried to import the LWRP package on my game to use the new 2d light feature and i got a massage saying csc.exe has stopped working which for all i know is the C# compiler in visual studio , most of the times when i import a new package in unity to use it in my game it gives me this massage (csc.exe has stopped working) while importing and then appears an empty error in the console some times they are two empty errors or even three they make me unapple to test the game or build it those errors come sometimes when building the game ruining all my work if you can help or have a solution for this please tell me making games became impossible with this error