Execution failed for task ':genIntellijRuns'.
> Could not resolve all files for configuration ':minecraftCopy'.
   > Could not find net.minecraftforge:forge:1.21.4-54.0.26_mapped_official_1.21.4.
     Searched in the following locations:
       - file:/Users/user/.gradle/caches/forge_gradle/bundeled_repo/net/minecraftforge/forge/1.21.4-54.0.26_mapped_official_1.21.4/forge-1.21.4-54.0.26_mapped_official_1.21.4.pom
       - file:/Users/user/.gradle/caches/forge_gradle/bundeled_repo/net/minecraftforge/forge/1.21.4-54.0.26_mapped_official_1.21.4/forge-1.21.4-54.0.26_mapped_official_1.21.4.jar
     Required by:
         root project :

Possible solution:
 - Declare repository providing the artifact, see the documentation at https://docs.gradle.org/current/userguide/declaring_repositories.html