Unresolved reference: println

[g0rr3]

So im using the helix editor to open a fresh generated gradle-kotlin application. Println is marked red and it says Unresolved reference: println. The log says:
2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "ERROR: package fragment is not found for module:<main>[ModuleDescriptorImpl@35c86c3d] file:KtFile: /home/g0r3/projekte/test/ap p/src/main/kotlin/test/App.kt\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "Attachments:\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "file.kt\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "/*\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- " * This Kotlin source file was generated by the Gradle 'init' task.\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- " */\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "package test\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "class App {\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- " val greeting: String\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- " get() {\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- " return \"Hello World!\"\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- " }\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "}\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "fun main() {\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- " println(App().greeting)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- " prin\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "}\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "org.jetbrains.kotlin.utils.KotlinExceptionWithAttachments: package fragment is not found for module:<main>[ModuleDescriptorImpl@35 c86c3d] file:KtFile: /home/g0r3/projekte/test/app/src/main/kotlin/test/App.kt\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat org.jetbrains.kotlin.codegen.PackageCodegenImpl.getOnlyPackageFragment(PackageCodegenImpl.java:160)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat org.jetbrains.kotlin.codegen.PackageCodegenImpl.<init>(PackageCodegenImpl.java:62)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat org.jetbrains.kotlin.codegen.ClassFileFactory.forPackage(ClassFileFactory.java:230)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat org.jetbrains.kotlin.codegen.DefaultCodegenFactory.generatePackage(CodegenFactory.kt:77)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat org.jetbrains.kotlin.codegen.DefaultCodegenFactory.generateModule(CodegenFactory.kt:62)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat org.jetbrains.kotlin.codegen.KotlinCodegenFacade.compileCorrectFiles(KotlinCodegenFacade.java:35)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat org.javacs.kt.compiler.Compiler.generateCode(Compiler.kt:570)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat org.javacs.kt.SourcePath.save(SourcePath.kt:275)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat org.javacs.kt.SourcePath.saveAllFiles(SourcePath.kt:287)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat org.javacs.kt.KotlinTextDocumentService$lintAll$1.invoke(KotlinTextDocumentService.kt:267)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat org.javacs.kt.KotlinTextDocumentService$lintAll$1.invoke(KotlinTextDocumentService.kt:265)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat org.javacs.kt.util.Debouncer.submitImmediately$lambda-1(Debouncer.kt:27)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:577)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\n" 2023-02-26T23:03:56.944 helix_lsp::transport [ERROR] err <- "\tat java.base/java.lang.Thread.run(Thread.java:1589)\n"

[AdMorgado]

Hey you cringe lord,
I had this exact same error, I fixed it by making sure the kotlin version and the JDK installed in my machine hit correctly.
Essentially I just downloaded kotlin through the SDK Tool

[themkat]

Possible duplicate of #413.