Well, libGDX 1.13.5 wasn't entirely free of problems... especially on Android, where release builds in particular hit a bug in Android's R8 compiler rather often, and this can result in performance degradation or even crashes. This rolls back the default libGDX to 1.13.1, but also updates Gradle to 8.14.1 (the just-released latest version) and fixes some more noticeable deprecation warnings. It also finally silences the distracting and misleading warning message about Gradle 9.0!!! This has been a pox on new developers and I'm glad it's finally gone. The Android Gradle Plugin now matches libGDX tests at version 8.7.3, and many third-party dependencies have been updated, including KTX. The samples also include one extra line in resize(), which you can leave in or remove if you want, which skips resize() logic if the window is minimized (giving it 0 width and 0 height). Having 0 or negative width and height doesn't make sense for laying out a user interface, and division by 0 can easily happen while determining aspect ratio if that case isn't handled.
This version only ships with a cross-platform JAR and a Linux executable, because the Windows executable is currently getting false positives from multiple antivirus vendors. 😠 The JAR is 24MB smaller and works everywhere that has a JDK installed, so it should be fine on Windows if your JDK is 17 or newer. If you just have a JRE or if your JDK is older or misconfigured, use a nice new JDK that works, like BellSoft's OpenJDK version 17 or 21. JDK 24 issues warnings all the time, so you might want to avoid it for now.
Good luck with this one! Using libGDX 1.13.1 is battle-tested and should "just work," but there could still be issues with this latest Gradle release. It's been tested on some previously-problematic tasks, and it seems to work well so far. Silencing the warnings caused purely by Gradle files is also somewhat of an experiment, but it shouldn't interfere with warnings in your IDE or given during Java/Kotlin compilation.
Full Changelog: v1.13.5.0...v1.13.5.1