这种报错，怎么处理？

运行结果及报错内容

VM772 WAService.js:2 TypeError: Cannot read property 'replace' of undefined
    at an (VM772 WAService.js:2)
    at r.<anonymous> (VM772 WAService.js:2)
    at VM772 WAService.js:2
    at app.js? [sm]:1
    at p (VM772 WAService.js:2)
    at <anonymous>:3:9
    at doWhenAllScriptLoaded (<anonymous>:1159:21)
    at Object.scriptLoaded (<anonymous>:1187:5)
    at Object.<anonymous> (<anonymous>:1212:22)
(env: Windows,mp,1.05.2110290; lib: 2.19.4)

在WAService.js 第2 行有一个类型错误，replace 是未定义