My game refuses to launch from Minecraft Launcher (Java issue ?)

Hello, I can not currently access the game from the launcher, this one tells me that the game has crashed but there is no crash report, I can only click on "CLOSE", I managed to activate the debug log and there is a Java error "Error: unable to find or load the main class net.minecraft.client.main.Main"
I have tried to reinstall the game, reinstall Java, remove Java from% PATH% and put it back, delete the .minecraft folder, my game is not modded so I should not have this problem!