logging from output thread has been disabled. it can be enabled in the settings

Opened MCLauncher 3.9.1.0 and 3.9.1.5

Chose any version of the jar files of the game.

every time the game crashes and doesnt launch anything, just pops out:

"logging from output thread has been disabled. it can be enabled in the settings",

can't play and don't know how to fix.

please help me, ty.