sample-apps/java-basic - incompatible types: java.lang.Void cannot be converted to java.lang.String

[pf512]

When I try to run the deployment script:

./2-deploy.sh mvn

I get the error:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:testCompile (default-testCompile) on project java-basic: Compilation failure [ERROR] <path>/aws-lambda-developer-guide/sample-apps/java-basic/src/test/java/example/InvokeTest.java:[22,42] incompatible types: java.lang.Void cannot be converted to java.lang.String

This is on a M1 MacBook using both Amazon Corretto 8 and 11.