Process instances getting stuck on start node in local install of Appian

I have installed appian 21.4 on local (Win 10) . I have observed once I start the process model for debug or through action it's always stuck on start node itself.

I don't see any specific error in logs. but while starting the tomcat I'm getting below error:

Error on tomcat startup:

022-02-17 01:22:30,579 [ForkJoinPool-1-worker-25] ERROR com.appiancorp.common.config.ConfigObject - An error occurred while trying to initialize the config LoadExceptionHandling [0ms] [resources 37ms]
java.nio.file.InvalidPathException: Cannot store the note content, because the location is not valid.: C:/appian21.4/appian/_admin/process_notes/exec/00/3/0
at com.appiancorp.process.notes.services.NotesContentServiceImpl.createNoteContent(NotesContentServiceImpl.java:164)
at com.appiancorp.process.notes.services.NotesContentServiceImpl.createNoteContent(NotesContentServiceImpl.java:178)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.appiancorp.util.MethodInvocationReflectionImpl.proceed(MethodInvocationReflectionImpl.java:23)
at com.appiancorp.security.authz.AuthorizationMethodInterceptor.invoke(AuthorizationMethodInterceptor.java:56)
at com.appiancorp.services.ServiceManager$ServiceInvocationHandler.invoke(ServiceManager.java:479)
at com.sun.proxy.$Proxy397.createNoteContent(Unknown Source)
at com.appiancorp.process.execution.service.ExceptionHandlerServiceFacade.registerExceptionTypesWithNotes(ExceptionHandlerServiceFacade.java:160)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.appiancorp.util.MethodInvocationReflectionImpl.proceed(MethodInvocationReflectionImpl.java:23)
at com.appiancorp.security.authz.AuthorizationMethodInterceptor.invoke(AuthorizationMethodInterceptor.java:56)
at com.appiancorp.services.ServiceManager$ServiceInvocationHandler.invoke(ServiceManager.java:479)
at com.sun.proxy.$Proxy396.registerExceptionTypesWithNotes(Unknown Source)
at com.appiancorp.process.admin.LoadExceptionHandling.finish(LoadExceptionHandling.java:56)
at com.appiancorp.common.config.ConfigObject.runTimed(ConfigObject.java:322)
at com.appiancorp.common.config.ConfigObject.run(ConfigObject.java:268)
at com.appiancorp.common.config.ConfigObject.access$100(ConfigObject.java:71)
at com.appiancorp.common.config.ConfigObject$InitResources.call(ConfigObject.java:253)
at com.appiancorp.common.config.ConfigObject$InitResources.call(ConfigObject.java:241)
at java.util.concurrent.ForkJoinTask$AdaptedCallable.exec(ForkJoinTask.java:1424)
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:175)