WeChat Mini Programs's picture is saved to the album.

WeChat Mini Programs"s picture is saved to the photo album, api wx.saveImageToPhotosAlbum, which runs normally on the simulator and can be saved, but the error {"errMsg": "saveImageToPhotosAlbum:fail file not exists"} is displayed in the real machine. Which god can help to see what the problem is
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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1be86da-54557.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1be86da-54557.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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