小程序错误日志记录的：

null is not an object (evaluating \'a[0].node\')

@https://usr//app-service.js:2458:778

@https://lib/WAServiceMainContext.js:2:1513166

@https://lib/WAServiceMainContext.js:2:1513283

@https://lib/WAServiceMainContext.js:2:1512639

@https://lib/WASubContext.js:2:625662

h@https://lib/WASubContext.js:2:525703

@https://lib/WASubContext.js:2:526073

@https://lib/WAServiceMainContext.js:2:546771

k@https://lib/WAServiceMainContext.js:2:70057

大佬们，谁知道是么原因