VRender: Pan2 input 0 is not audio rate: 0.0 scalar

Hi, I’m following the directions for vRender here: FoxDot/README.md at master · Qirky/FoxDot · GitHub

When I run from .Extensions.VRender import vrender, I get the following error in SuperCollider. Wondering if anyone knows how to get around this. Thanks in advance!

Loading SynthDef from /opt/anaconda3/lib/python3.7/site-packages/FoxDot/osc/scsyndef/vrender.scd
Pan2 input 0 is not audio rate:  0.0 scalar
 ARGS:
   in: 0.0 Float
   pos: an OutputProxy OutputProxy
   level: 1.0 Float
SynthDef vrender build failed
ERROR: Pan2 input 0 is not audio rate:  0.0 scalar

PROTECTED CALL STACK:
	SynthDef:checkInputs	0x11900e480
		arg this = a SynthDef
		var firstErr = Pan2 input 0 is not audio rate:  0.0 scalar
	SynthDef:finishBuild	0x119008280
		arg this = a SynthDef
	a FunctionDef	0x118ffc000
		sourceCode = "<an open Function>"
	Function:prTry	0x11399a380
		arg this = a Function
		var result = nil
		var thread = a Thread
		var next = nil
		var wasInProtectedFunc = false
	
CALL STACK:
	Exception:reportError
		arg this = <instance of Error>
	Nil:handleError
		arg this = nil
		arg error = <instance of Error>
	Thread:handleError
		arg this = <instance of Thread>
		arg error = <instance of Error>
	Object:throw
		arg this = <instance of Error>
	Function:protect
		arg this = <instance of Function>
		arg handler = <instance of Function>
		var result = <instance of Error>
	SynthDef:build
		arg this = <instance of SynthDef>
		arg ugenGraphFunc = <instance of Function>
		arg rates = nil
		arg prependArgs = nil
	< closed FunctionDef >  (no arguments or variables)
	< closed FunctionDef >
		arg msg = [*2]
		arg time = 150.637079433
		arg addr = <instance of NetAddr>
		arg port = 57120
		var fn = <instance of File>
	OSCMessageDispatcher:value
		arg this = <instance of OSCMessageDispatcher>
		arg msg = [*2]
		arg time = 150.637079433
		arg addr = <instance of NetAddr>
		arg recvPort = 57120
	Main:recvOSCmessage
		arg this = <instance of Main>
		arg time = 150.637079433
		arg replyAddr = <instance of NetAddr>
		arg recvPort = 57120
		arg msg = [*2]
^^ The preceding error dump is for ERROR: Pan2 input 0 is not audio rate:  0.0 scalar