Tests on Mac fail for doing JRE download

[kaby76]

         Download area for JRE (JavaDownloadDirectory): /Users/runner/.jre/
         Paths to search for the java executable, in order, are: DOWNLOAD
         probing java executable at DOWNLOAD
         Path to try is DOWNLOAD
         Probing DOWNLOAD
         Trying pattern /Users/runner/.jre/.*/java
         os_arch is Unix 14.6.1
         os_arch str is 
         os_arch is Unix 14.6.1
         os_arch is Unix 14.6.1
         os_arch is Unix 14.6.1
         os_arch is Unix 14.6.1
         os_arch is Unix 14.6.1
         os_arch is Unix 14.6.1
     1>/Users/runner/.nuget/packages/antlr4buildtasks/12.8.0/build/Antlr4BuildTasks.targets(138,9): error ANT02: Cannot find Java executable''   at Antlr4.Build.Tasks.RunAntlrTool.SetupJava() [/Users/runner/work/Antlr4BuildTasks/Antlr4BuildTasks/_tests/single-no-java/single.csproj]
Error: /Users/runner/.nuget/packages/antlr4buildtasks/12.8.0/build/Antlr4BuildTasks.targets(138,9): error ANT02:    at Antlr4.Build.Tasks.RunAntlrTool.Execute() [/Users/runner/work/Antlr4BuildTasks/Antlr4BuildTasks/_tests/single-no-java/single.csproj]
     1>/Users/runner/.nuget/packages/antlr4buildtasks/12.8.0/build/Antlr4BuildTasks.targets(138,9): error ANT02: The Antlr4 tool failed. [/Users/runner/work/Antlr4BuildTasks/Antlr4BuildTasks/_tests/single-no-java/single.csproj]
     1>Done Building Project "/Users/runner/work/Antlr4BuildTasks/Antlr4BuildTasks/_tests/single-no-java/single.csproj" (default targets) -- FAILED.

Looks like there are several problems.