Crash when starting a springboot application with a YAML env file

[BaraBaltico]

When attempting to run a springboot app with the envfile pointing to a yaml file I have the crash below.Putting the same properties into a .properties file works fine. Runtime is Java 17 on windows

  Failed to execute java run configuration async
  
  java.lang.ClassCastException: class java.util.LinkedHashMap cannot be cast to class java.lang.String (java.util.LinkedHashMap and java.lang.String are in module java.base of loader 'bootstrap')
at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:721)
at net.ashald.envfile.platform.EnvFileEnvironmentVariables.render(EnvFileEnvironmentVariables.java:68)
at net.ashald.envfile.products.idea.IdeaRunConfigurationExtension.updateJavaParameters(IdeaRunConfigurationExtension.java:71)
at com.intellij.execution.RunConfigurationExtension.updateJavaParameters(RunConfigurationExtension.java:27)
at com.intellij.execution.JavaRunConfigurationExtensionManager.updateJavaParameters(JavaRunConfigurationExtensionManager.kt:42)
at com.intellij.execution.application.BaseJavaApplicationCommandLineState.lambda$setupJavaParameters$0(BaseJavaApplicationCommandLineState.java:37)
at com.intellij.openapi.application.ReadAction.lambda$run$1(ReadAction.java:64)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:923)
at com.intellij.openapi.application.ReadAction.compute(ReadAction.java:76)
at com.intellij.openapi.application.ReadAction.run(ReadAction.java:63)
at com.intellij.execution.application.BaseJavaApplicationCommandLineState.setupJavaParameters(BaseJavaApplicationCommandLineState.java:36)
at com.intellij.execution.application.ApplicationCommandLineState.createJavaParameters(ApplicationCommandLineState.java:62)
at com.intellij.spring.boot.run.SpringBootCommandLineState.createJavaParameters(SpringBootCommandLineState.java:46)
at com.intellij.execution.configurations.JavaCommandLineState.getJavaParameters(JavaCommandLineState.java:41)
at com.intellij.execution.impl.DefaultJavaProgramRunner.patchJavaCommandLineParams(DefaultJavaProgramRunner.java:132)
at com.intellij.execution.impl.DefaultJavaProgramRunner.lambda$doExecuteAsync$4(DefaultJavaProgramRunner.java:158)
at com.intellij.execution.target.TargetEnvironmentAwareRunProfileState$1.run(TargetEnvironmentAwareRunProfileState.java:58)
at com.intellij.openapi.progress.impl.CoreProgressManager.startTask(CoreProgressManager.java:428)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.startTask(ProgressManagerImpl.java:115)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcessWithProgressAsynchronously$6(CoreProgressManager.java:478)
at com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$4(ProgressRunner.java:251)
at com.intellij.openapi.progress.ProgressManager.lambda$runProcess$0(ProgressManager.java:71)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:186)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$13(CoreProgressManager.java:604)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:679)
at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:635)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:603)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:61)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:173)
at com.intellij.openapi.progress.ProgressManager.runProcess(ProgressManager.java:71)
at com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$5(ProgressRunner.java:251)
at com.intellij.openapi.progress.impl.ProgressRunner.lambda$launchTask$18(ProgressRunner.java:465)
at com.intellij.openapi.progress.impl.ProgressRunner.lambda$launchTask$19(ProgressRunner.java:477)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:702)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:699)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:699)
at java.base/java.lang.Thread.run(Thread.java:833)