I start the launcher
I choose the button "gioca scarica la 1.11.2 - ultima verione" (play)
in the lower part of the form, the message "praparazione"
but nothing happens , the progress bar remains empty
in the log I found

[0209/191815:INFO:LauncherAppBrowser.cpp(24)] Work dir is E:\minecraft

[0209/191815:INFO:ClientHandler.cpp(182)] Creating launcher window.

[0209/191816:INFO:LauncherAppRenderer.cpp(110)] Javascript bridge extended.

[0209/191817:INFO:ClientHandler.cpp(846)] Preferences / startup: Read preferences

[0209/191818:INFO:LocalVersionProvider.cpp(81)] Looking for installed versions in E:/minecraft\versions

[0209/191818:INFO:ClientHandler.cpp(846)] Preferences: Wrote preferences

[0209/191818:INFO:ClientHandler.cpp(846)] Configurations: Loading profiles

[0209/191818:INFO:ClientHandler.cpp(846)] Configurations: Loading settings

[0209/191818:INFO:ClientHandler.cpp(846)] Session: Read authDB

[0209/191818:INFO:ClientHandler.cpp(846)] Updating server status

[0209/191818:INFO:GameController.cpp(216)] Reinstancing game callbacks...

[0209/191818:INFO:ClientHandler.cpp(846)] Session: Validated token

[0209/191818:INFO:ClientHandler.cpp(846)] Preferences: Wrote preferences

[0209/191818:INFO:ClientHandler.cpp(846)] Session: Wrote authDB

[0209/191818:INFO:ClientHandler.cpp(846)] Changing view to: main.news

[0209/191818:INFO:ClientHandler.cpp(846)] GameStarter: Previous instance(s) found

[0209/191820:INFO:ClientHandler.cpp(846)] Preferences: Wrote preferences

[0209/191823:INFO:ClientHandler.cpp(846)] Preferences: Wrote preferences

[0209/191824:INFO:ClientHandler.cpp(846)] Changing view to: main.help

[0209/191828:INFO:ClientHandler.cpp(846)] Link clicked: https://bugs.mojang.com/browse/MCL/?ref=launcher