Java GI spice glib build error

> Task :buildSrc:compileJava
Note: /home/asorensen/java-gi/buildSrc/src/main/java/io/github/jwharm/javagi/gir/Field.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use preview features of Java SE 21.
Note: Recompile with -Xlint:preview for details.

> Task :spiceclientglib:generateSources FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':spiceclientglib:generateSources'.
> Cannot invoke "io.github.jwharm.javagi.gir.RegisteredType.name()" because "type" is null

* 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 20s
46 actionable tasks: 44 executed, 2 from cache