Try updating Kotlin to 2.0.21 .

There are currently issues with Kotlin on Android, using the rearranged dependencies that Construo currently needs. Construo shouldn't need anything rearranged in user projects. I'll see what can be done.

README.md

@@ -81,7 +81,7 @@ Liftoff can see it (using [JetBrains Toolbox](https://www.jetbrains.com/toolbox-
 If you want to use Kotlin, a Kotlin template is recommended (such as `Kotlin Logo`); these mention that they use "Kotlin
 launchers" in their descriptions. The KTX libraries are all available as third-party extensions; these aren't required
 for Kotlin projects, but they can be helpful. KTX and other Kotlin-based libraries need Kotlin enabled. Currently,
-projects generated here default to using Kotlin 2.0.20, which may have some incompatibilities with the earlier 1.9.x
+projects generated here default to using Kotlin 2.0.21, which may have some incompatibilities with the earlier 1.9.x
 releases. You could instead set the version to the newest 1.9.x release (currently 1.9.25), in the Languages dialog,
 when you select Kotlin as an option. The 2.x series of releases claims a number of nice improvements, however, and most
 libraries appear to be either very close to compatible, or are compatible already. Liftoff itself is built using Kotlin

gradle.properties

@@ -2,7 +2,7 @@ org.gradle.daemon=false
 org.gradle.jvmargs=-Xms512M -Xmx1G -Dfile.encoding=UTF-8 -Dconsole.encoding=UTF-8
 liftoffVersion=1.13.0.0-SNAPSHOT
 #kotlinVersion=1.9.25
-kotlinVersion=2.0.20
+kotlinVersion=2.0.21
 gdxVersion=1.13.0
 lmlVersion=1.10.1.12.1
 #visUiVersion=1.5.3

src/main/kotlin/gdx/liftoff/data/languages/Kotlin.kt

@@ -14,7 +14,7 @@ import gdx.liftoff.views.JvmLanguage
 @Suppress("unused") // Class accessed via reflection.
 class Kotlin : Language {
   override val id = "kotlin"
-  override val version = "2.0.20"
+  override val version = "2.0.21"
 
   override fun initiate(project: Project) {
     project.rootGradle.buildDependencies.add("\"org.jetbrains.kotlin:kotlin-gradle-plugin:\$kotlinVersion\"")

src/main/resources/ui-data/defaults.properties

@@ -10,7 +10,7 @@ extensionsDefaultNames=
 thirdPartyDefaultNames=
 templateDefaultName=classic
 groovyDefaultVersion=4.0.22
-kotlinDefaultVersion=2.0.20
+kotlinDefaultVersion=2.0.21
 scalaDefaultVersion=3.5.0
 libgdxDefaultVersion=1.13.0
 javaDefaultVersion=11