my game output:

15:56:10
launcher
main
debug
Download from https://resources.download.minecraft.net/70/7050f6e6c7e7b31120af5516517ed46b47688a7e passed checksum check.
15:56:10
launcher
main
info
Downloaded https://resources.download.minecraft.net/70/7050f6e6c7e7b31120af5516517ed46b47688a7e to C:\Users\René\AppData\Roaming\.minecraft\assets\objects\70\7050f6e6c7e7b31120af5516517ed46b47688a7e
15:56:10
launcher
main
debug
Download from https://resources.download.minecraft.net/7f/7ff02e848584b5585030d8b875b427a6cfb264f6 passed checksum check.
15:56:10
launcher
main
info
Downloaded https://resources.download.minecraft.net/7f/7ff02e848584b5585030d8b875b427a6cfb264f6 to C:\Users\René\AppData\Roaming\.minecraft\assets\objects\7f\7ff02e848584b5585030d8b875b427a6cfb264f6
15:56:10
launcher
main
debug
All download jobs finished, canceling update timer
15:56:10
launcher
main
debug
And io service
15:56:10
launcher
main
debug
Done!
15:56:10
launcher
main
debug
Downloads successful
15:56:10
launcher
main
debug
Extracting 7 files!
15:56:10
launcher
main
info
Using default game log configuration client-1.12.xml (outputs XML)
15:56:10
launcher
main
debug
Installing versions!
15:56:10
launcher
main
info
Installed 1.13 to C:\Users\René\AppData\Roaming\.minecraft\versions\1.13\1.13.json
15:56:11
launcher
main
info
Error: Could not find or load main class net.minecraft.client.main.Main
15:56:11
monitor
Process Monitor
fatal
Process crashed with exit code 1