查看完整版本: there is no text in field or field cannot be read 怎么解决

there is no text in field or field cannot be read 怎么解决

本人刚开始学习Robot,在按照那个计算器的例子进行功能测试，在进行选择校验点后出现there is  no text in field or field cannot be read.
请问该怎么解决？