HELP :(

== MCP 9.10 (data: 9.10, client: 1.8, server: 1.8) ==
"scalac" is not found on the PATH.  Scala files will not be recompiled
# found ff, ff patches, srgs, name csvs, doc csvs, param csvs, astyle, astyle config, rg, ss
Looking in C:\Users\Tim\AppData\Roaming\.minecraft\versions for mc installs... OK
Copying assets... OK
Parsing JSON file... OK
Looking for minecraft main jar... OK
> Checking libraries...
        Copying library twitch-external-platform... Error copying library tv.twitch:twitch-external-platform:4.5
Drücken Sie eine beliebige Taste . . .