Launcher stays on "Preparing..." after pressing "Play"

When I press "Play" in my launcher it just only shows "Preparing..." and nothing else.

Need help! I'm the admin of my server!

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Launcher log:

[0209/153304:INFO:ClientHandler.cpp(846)] Preferences: Wrote preferences

[0209/153304:INFO:GameCallbacks.cpp(161)] launcher/launcher (main) info Preparing to launch minecraft client for 1.11.2

[0209/153304:INFO:GameCallbacks.cpp(161)] launcher/launcher (main) debug Prepared asset index

[0209/153304:INFO:GameCallbacks.cpp(161)] launcher/launcher (main) debug Have 1215 total files to check or download

[0209/153304:INFO:GameCallbacks.cpp(161)] launcher/launcher (main) debug Waiting for 1215 futures