wirebox with null support

wirebox: 5.6.2
lucee: 5.3.3.62
os: Win10

hi all!

i wrote this in my Application.cfc:

this.nullSupport=true;

than i get this error:

The function [configure] does not exist in the Object, only the following functions are available: [append,clear,copy,count,delete,duplicate,each,every,filter,find,findKey,findValue,insert,isEmpty,keyArray,keyExists,keyList,keyTranslate,len,map,reduce,some,sort,update].

{ts ‘2020-05-12 23:40:04’} - 127.0.0.1

File: D:\lavoro\cargopooling\smartcargo-account\smartcargo-account-vhost\ROOT\wirebox\system\ioc\config\Binder.cfc
Line: 76

74: arguments.config.getPropertyMixin = this.utility.getMixerUtil().getPropertyMixin;
75: // Execute the configuration
**76: arguments.config.configure(this);**
77: // Load the raw data DSL
78: loadDataDSL( arguments.config.getPropertyMixin("wireBox","variables",structnew()) );

any hint?
many thanks.