SOLVED.
In my user page, some of image icons are broken.
Though this is not a serious problem, I am a little uncomfortable with it.
So I checked if the image folders which contain the image icon files(png, svg, ...) existed.
If a folder exists, the access to its folder is denied, showing 403 forbidden error. Else if not, then it shows 404 not found error.
The results are shown below.
I am afraid some of the image icon folders don't exist (though I am not 100% confident).
I hope this problem will be solved if possible.
The icon exists.
ELEMENTARY,
https://static.checkio.org/static/imgv3/stations/library/,
https://static.checkio.org/static/imgv3/stations/library/completed.svg,
* 403 Forbidden, and the icon exists. *
HOME,
https://static.checkio.org/static/imgv3/stations/home/,
https://static.checkio.org/static/imgv3/stations/home/completed.svg,
* 403 Forbidden, and the icon exists. *
O'REILLY,
https://static.checkio.org/static/imgv3/stations/oreilly/,
https://static.checkio.org/static/imgv3/stations/oreilly/completed.svg,
* 403 Forbidden, and the icon exists. *
The icon doesn't exist.
BLIZZARD,
https://static.checkio.org/static/imgv3/stations/blizzard/,
https://static.checkio.org/static/imgv3/stations/blizzard/completed.svg,
* 404 Not Found, and the icon does not exist. *
SHELTER,
https://static.checkio.org/static/imgv3/stations/shelter/,
https://static.checkio.org/static/imgv3/stations/shelter/completed.svg,
* 404 Not Found, and the icon does not exist. *
HERMIT,
https://static.checkio.org/static/imgv3/stations/hermit/,
https://static.checkio.org/static/imgv3/stations/hermit/completed.svg,
* 404 Not Found, and the icon does not exist. *
Created at: 2016/09/27 07:28; Updated at: 2016/09/30 14:26