Deleting array element

[crow-ua]

I have an array in json:
"elements": [ "1", "2", "3", "4" ]
I want to delete the last one:
"elements/#[3]": ""
i get an error:

Transformation found: elements/#[3]: 
Transforming file C:\BuildAgent\_work\16\s\manifest\manifest.json

##[error]System.Management.Automation.MethodInvocationException: Exception calling "Transform" with "4" argument(s): "Object reference not set to an instance of an object." ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at MagicChunks.Helpers.JsonExtensions.GetChildProperty(JContainer source, String name)
   at MagicChunks.Documents.JsonDocument.UpdateTargetElement(JObject current, String targetElementName, String value)
   at MagicChunks.Documents.JsonDocument.ReplaceKey(String[] path, String value)
   at MagicChunks.Core.Transformer.Transform(IDocument source, TransformationCollection transformations)
   at MagicChunks.Core.Transformer.Transform(String source, TransformationCollection transformations)
   at MagicChunks.TransformTask.Transform(String type, String sourcePath, String targetPath, TransformationCollection transformation)
   at CallSite.Target(Closure , CallSite , Type , Object , Object , Object , Object )
   --- End of inner exception stack trace ---
   at System.Management.Automation.ExceptionHandlingOps.CheckActionPreference(FunctionContext funcContext, Exception exception)
   at System.Management.Automation.Interpreter.ActionCallInstruction`2.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)

I've also tried "#elements/[3]": "", fails too.

[NekidMugh]

Were you ever able to figure this out? I am encountering the same thing where I need to be able to change/delete a value in an single value array like yours.