My game crashes on startup

immediately at startup i click play and it loads, and says sorry for the inconvenience. below is my logs if that helps anyone.

Considering library net.minecraftforge:forge:1.8.8-11.15.0.1655: Not Downloading
Considering library io.netty:netty-all:4.0.23.Final: Not Downloading
Considering library net.minecraft:launchwrapper:1.12: Not Downloading
Considering library org.ow2.asm:asm-all:5.0.3: Not Downloading
Considering library jline:jline:2.13: Not Downloading
Considering library com.typesafe.akka:akka-actor_2.11:2.3.3
Considering library com.typesafe:config:1.2.1
Considering library org.scala-lang:scala-actors-migration_2.11:1.1.0
Checking "C:\Users\PC\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-actors-migration_2.11\1.1.0\scala-actors-migration_2.11-1.1.0.jar" internal checksums
    checksums.sha1 validated successfully
    Jar contents validated successfully
Considering library org.scala-lang:scala-compiler:2.11.1
Checking "C:\Users\PC\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-compiler\2.11.1\scala-compiler-2.11.1.jar" internal checksums
    checksums.sha1 validated successfully
    Jar contents validated successfully
Considering library org.scala-lang.plugins:scala-continuations-library_2.11:1.0.2
Checking "C:\Users\PC\AppData\Roaming\.minecraft\libraries\org\scala-lang\plugins\scala-continuations-library_2.11\1.0.2\scala-continuations-library_2.11-1.0.2.jar" internal checksums
    checksums.sha1 validated successfully
    Jar contents validated successfully
Considering library org.scala-lang.plugins:scala-continuations-plugin_2.11.1:1.0.2
Checking "C:\Users\PC\AppData\Roaming\.minecraft\libraries\org\scala-lang\plugins\scala-continuations-plugin_2.11.1\1.0.2\scala-continuations-plugin_2.11.1-1.0.2.jar" internal checksums
    checksums.sha1 validated successfully
    Jar contents validated successfully
Considering library org.scala-lang:scala-library:2.11.1
Checking "C:\Users\PC\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-library\2.11.1\scala-library-2.11.1.jar" internal checksums
    checksums.sha1 validated successfully
    Jar contents validated successfully
Considering library org.scala-lang:scala-parser-combinators_2.11:1.0.1
Checking "C:\Users\PC\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-parser-combinators_2.11\1.0.1\scala-parser-combinators_2.11-1.0.1.jar" internal checksums
    checksums.sha1 validated successfully
    Jar contents validated successfully
Considering library org.scala-lang:scala-reflect:2.11.1
Checking "C:\Users\PC\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-reflect\2.11.1\scala-reflect-2.11.1.jar" internal checksums
    checksums.sha1 validated successfully
    Jar contents validated successfully
Considering library org.scala-lang:scala-swing_2.11:1.0.1
Checking "C:\Users\PC\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-swing_2.11\1.0.1\scala-swing_2.11-1.0.1.jar" internal checksums
    checksums.sha1 validated successfully
    Jar contents validated successfully
Considering library org.scala-lang:scala-xml_2.11:1.0.2
Checking "C:\Users\PC\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-xml_2.11\1.0.2\scala-xml_2.11-1.0.2.jar" internal checksums
    checksums.sha1 validated successfully
    Jar contents validated successfully
Considering library lzma:lzma:0.0.1: Not Downloading
Considering library net.sf.jopt-simple:jopt-simple:4.6: Not Downloading
Considering library java3d:vecmath:1.5.2
Considering library net.sf.trove4j:trove4j:3.0.3