Constant Error Problem

when ever i try to start it is just gives me this:

FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring root project 'cba'.
> Could not resolve all files for configuration ':_compileJava_1'.
 > Could not download fastutil-8.5.6.jar (it.unimi.dsi:fastutil:8.5.6)
  > Could not get resource 'https://maven.minecraftforge.net/it/unimi/dsi/fastutil/8.5.6/fastutil-8…'.
  > Premature end of Content-Length delimited message body (expected: 23,565,248; received: 8,444,528)
* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 2m 29s
 
BUILD FAILED
Task completed in 16 minutes and 24 seconds