ckfinder ImagePreview vs Thubnail

Question

I've been banging my head for hours now, and hope someone had come across this problem and will be able to help me.

CKFinder doesn't show thumb images :(

When I get a list of images in a folder thumb images do not show but if I preview an image it works

Here it is an example, this is a preview URL which returns an image

http://localhost:12345/ckfinder/connector?command=ImagePreview&lang=en&type=Documents&currentFolder=%2Flogos%2F&hash=fdfe49e3ec5268debd763cc253c28db3f7642de7&folderId=Sponsors&fileName=e0523dee83c04e3d82701b496455b086%20(1).png&size=760x569&date=20200605083700

this is a thumb URL of the same image

http://localhost:12345/ckfinder/connector?command=Thumbnail&lang=en&type=Documents&currentFolder=%2Flogos%2F&hash=fdfe49e3ec5268debd763cc253c28db3f7642de7&folderId=Sponsors&fileName=e0523dee83c04e3d82701b496455b086%20(1).png&size=760x569&date=20200605083700

the only difference is in the command bit ImagePreview vs Thumbnail

If I call the above URL I get

// http://localhost:12345/ckfinder/connector?command=Thumbnail&lang=en&type=Documents&currentFolder=%2Flogos%2F&hash=fdfe49e3ec5268debd763cc253c28db3f7642de7&folderId=Sponsors&fileName=e0523dee83c04e3d82701b496455b086%20(1).png&size=760x569&date=20200605083700

{
  "error": {
    "number": 117,
    "message": "File not found. Please refresh the files list and try again."
  },
  "currentFolder": {
    "path": "/logos/",
    "acl": 1023,
    "url": "http://cdn.xyzxxxx.xxxxx/uploads/Sponsors/logos/"
  },
  "resourceType": "Documents"
}

Does anyone have a clue how to fix this?