Error. Undefined property: stdClass::$field

[SuGDevelopers]

I have the following error. Version 2.0.0

#message: "Undefined property: stdClass::$field"
#code: 0
#file: "C:\Users\vp1zakq\Projects\sug-data\vendor\timgws\query-builder-parser\src\QueryBuilderParser\QueryBuilderParser.php"
#line: 310

rule value

{#1308 ▼ // vendor\timgws\query-builder-parser\src\QueryBuilderParser\QueryBuilderParser.php:314
+"condition": "AND"
+"rules": array:2 [▼
0 => {#1309 ▼
+"id": "k000_unsel"
+"field": "k000_unsel"
+"type": "string"
+"input": "text"
+"operator": "is_not_empty"
+"value": null
}
1 => {#1310 ▼
+"id": "k000_herkunf"
+"field": "k000_herkunf"
+"type": "string"
+"input": "text"
+"operator": "is_not_empty"
+"value": null
}
]
}