Why do I need a double slash in the path when I visit after uploading the picture?

Why do I need to access the image with a double slash in the path when I upload the image? otherwise, what is wrong with the configuration of 502
? Or is there something wrong with the code
[you can visit] http://www.deathghost.cn//art.
[502] http://www.deathghost.cn/arti.

Dec.10,2021

check the Nginx configuration. It looks as if there is something wrong with the Ngnix configuration.

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-64f5-7aad42-28c9f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-7aad42-28c9f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?