What error is being reported in the machine code of the sensor X40 of KM-ASSYH2-04, and how is the rear section-M7038-the working area side positioning cylinder extending abnormally?

Is the error related to the positioning of
The solution for the error described as Rear section-M7038-the working area side positioning cylinder extends abnormally, please check sensor X40 is to check the sensor X40 for any malfunction or damage