I am trying to access the accessibility using r5r package. I have downloaded JDK21 and setup_r5r(), but when i continue to run travel_time_matrix(), it always appear the error message ‘Error in .jcall(“RJavaTools”, “Z”, “hasField”, .jcast(x, “java/lang/Object”), :
java.lang.NullPointerException: Cannot invoke “Object.getClass()” because “” is null’.
It is odd. I can run the example case within the package. And i am now using the files in a workshop which has been sucessful before. so i