微信小程序后台上报大量插件错误日志：

Cannot read property \'length\' of undefined

TypeError: Cannot read property \'length\' of undefined

at https://usr/__plugin__/插件ID/appservice.js:4906:14148

at ut.<anonymous> (https://usr/__plugin__/插件ID/appservice.js:4837:77234)

at Object.r.safeCallback (https://lib/WASubContext.js:2:2132010)