index out of bounds

[geeskepeeters]

After using the code
jsonio rv, file("filename.json") nourl ob(500)

I get the error message saying:
java.lang.IndexOutOfBoundsException: Index 1 out of bounds for length 0
at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)
at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266)
at java.base/java.util.Objects.checkIndex(Objects.java:361)
at java.base/java.util.ArrayList.get(ArrayList.java:427)
at org.paces.Stata.Input.FlatJSON.flatten(FlatJSON.java:199)
at org.paces.Stata.Input.FlatJSON.flatten(FlatJSON.java:181)
at org.paces.Stata.Input.FlatJSON.flatten(FlatJSON.java:199)
at org.paces.Stata.Input.FlatJSON.flatten(FlatJSON.java:199)
at org.paces.Stata.Input.FlatJSON.flatten(FlatJSON.java:199)
at org.paces.Stata.Input.FlatJSON.flatten(FlatJSON.java:181)
at org.paces.Stata.Input.FlatJSON.flatten(FlatJSON.java:199)
at org.paces.Stata.Input.FlatJSON.flatten(FlatJSON.java:121)
at org.paces.Stata.Input.InJSON.insheetFileToVars(InJSON.java:192)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at com.stata.Javacall.load(Javacall.java:277)
at com.stata.Javacall.load(Javacall.java:92)

The result is that no data are read into Stata.

How can I solve this issue?
Thank you