Мірадор - viewer

SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON

{
  "manifest": {
    "error": "SyntaxError: Unexpected token '<', \"<!DOCTYPE \"... is not valid JSON",
    "id": "/api/digital_items/64111/2/manifest.json/",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b0f3cf08-debd-470c-8eaa-d6933da6116a",
      "cw-62a38061-c2b8-4465-bde3-60266715fa18"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0428dd24-6a2b-489e-bbdd-6f55b9472ea9",
    "manifestId": "/api/digital_items/64111/2/manifest.json/",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "annotations",
    "thumbnailNavigationId": "cw-62a38061-c2b8-4465-bde3-60266715fa18",
    "thumbnailNavigationPosition": "off",
    "loadedManifest": "/api/digital_items/64111/2/manifest.json/",
    "canvasIndex": 0
  }
}