ScriptRunner REST端点及Fragment失效：脚本函数执行失败求助

我正在使用一个极简的REST端点及其配套Fragment，但功能无法正常运行。

Fragment配置截图 #

错误日志信息 #

2022-08-17 00:00:40,405+0200 https-openssl-nio-443-exec-297 ERROR mouh 0x69166x26 nxp314 10.248.27.109 /rest/scriptrunner/behaviours/latest/validators.json [c.o.jira.behaviours.BehaviourManagerImpl] Script function failed on issue: issue: PIE-68635, user: mouh, fieldId: init, file: , edit behaviour: https://itrac-dev.eur.ad.sag/plugins/servlet/scriptrunner/admin/behaviours/edit/15, https://itrac-dev.eur.ad.sag/plugins/servlet/scriptrunner/admin/behaviours/edit/17, https://itrac-dev.eur.ad.sag/plugins/servlet/scriptrunner/admin/behaviours/edit/21
2022-08-17 00:00:40,405+0200 https-openssl-nio-443-exec-297 ERROR mouh 0x69166x26 nxp314 10.248.27.109 /rest/scriptrunner/behaviours/latest/validators.json [c.o.jira.behaviours.BehaviourManagerImpl]

自定义REST端点代码 #

import com.onresolve.scriptrunner.runner.rest.common.CustomEndpointDelegate

import groovy.json.JsonBuilder

import groovy.transform.BaseScript

import javax.ws.rs.core.MultivaluedMap

import javax.ws.rs.core.Response

@BaseScript CustomEndpointDelegate delegate

callMounaSubTaskCreator( 

    httpMethod: "GET", groups: ["jira-administrators"] 

) { MultivaluedMap queryParams, String body -> 

    return Response.ok(new JsonBuilder([abc: 42]).toString()).build() 

}

内容的提问来源于stack exchange，提问作者منى