Minecraft forge won't launch, Help please

My Minecraft forge won't launch, when I press the launch button, the launcher closes which is normal but then Minecraft forge won't load. I'm confused about why this is happening. here is the output log:

22:45:53.301
Couldn't fetch SHA1 checksum for files.minecraftforge.net/maven/org/scala-lang/scala-parser-combinators_2.11/1.0.1/scala-parser-combinators_2.11-1.0.1.jar
22:45:53.303
Have local file C:\Users\Skye\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-parser-combinators_2.11\1.0.1\scala-parser-combinators_2.11-1.0.1.jar but don't know what size or hash it should be. Have to assume it's good.
22:45:53.337
Couldn't fetch SHA1 checksum for files.minecraftforge.net/maven/org/scala-lang/scala-reflect/2.11.1/scala-reflect-2.11.1.jar
22:45:53.339
Have local file C:\Users\Skye\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-reflect\2.11.1\scala-reflect-2.11.1.jar but don't know what size or hash it should be. Have to assume it's good.
22:45:53.421
Couldn't fetch SHA1 checksum for files.minecraftforge.net/maven/org/scala-lang/scala-swing_2.11/1.0.1/scala-swing_2.11-1.0.1.jar
22:45:53.422
Have local file C:\Users\Skye\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-swing_2.11\1.0.1\scala-swing_2.11-1.0.1.jar but don't know what size or hash it should be. Have to assume it's good.
22:45:53.590
Couldn't fetch SHA1 checksum for files.minecraftforge.net/maven/org/scala-lang/scala-xml_2.11/1.0.2/scala-xml_2.11-1.0.2.jar
22:45:53.592
Have local file C:\Users\Skye\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-xml_2.11\1.0.2\scala-xml_2.11-1.0.2.jar but don't know what size or hash it should be. Have to assume it's good.
22:45:54.208
Checking installations.
22:45:54.209
Minecraft client 1.12.2-forge1.12.2-14.23.5.2846 is ready to start.
22:45:54.209
Starting!
22:45:54.262
Version does not support log configuration, will assume one plaintext entry per line