When I upload file, I get error like this.

error01.png

I'm serving Statamic in a /blog/ subdirectory, but the error shows "/blog/blog/".

I set fieldset yamls like this.

    main_visual:
      display: Main Visual
      required: false
      type: file
      allowed: [png, gif, jpg, jpeg]
      destination: assets/img/
      resize:
        width: 712
        height: 350
        quality: 80 

I checked 'destination' directory, the file was uploaded.

file-uploaded01.png

But nothing shows up on admin screen.

screen01.png

How can I fix this?