同步PHP（读取文件）和Ajax（jquery ui滑块）时出现问题

I got an issue while trying to display a jquery UI slider with its range based on a values read with PHP from a text file. Its seems that it's a syncrhonising issue as I get the error: "An attempt was made to use an object that is not, or is no longer, usable" code: 11"I got an issue while trying to display a jquery