Java function error

[Alfa Beta]

When I try this:
https://old.reddit.com/r/tasker/comments/3hlh9z/help_how_to_get_current_lte_signal_strength_into/
I get error, how to solve?

15.35.10/E Java Function: obj -> obj
15.35.10/E Java Function use app context
15.35.10/JU analyse: target: info expected: null
15.35.10/JU target: analyse done: info: class: ???  obj: null partWithoutMods: null static: false const false casted: false
15.35.10/JU analyse: returnval: java.lang.Object expected: null
15.35.10/JU returnval: analyse done: java.lang.Object: class: java.lang.Object  obj: null partWithoutMods: null static: true const false casted: false
15.35.10/JU initClass: class: java.lang.Object  obj: null partWithoutMods: java.lang.Object static: true const false casted: false
15.35.10/JU initClass: retnovar: init with array handling -> class java.lang.Object
15.35.10/JU initClass: class: ???  obj: null partWithoutMods: info static: false const false casted: false
15.35.10/JU initClass: target: null: class: ???  obj: null partWithoutMods: info static: false const false casted: false
15.35.10/E Java Function: failed to init target class info
15.35.10/E result: stop task (error)
15.35.10/E Error: 1
15.35.10/MacroEdit action finished exeID 1 action no 2 code 664 status: Err next 2

[jmjc...@gmail.com]

You will have to tell us more. Which action casues this error?