Miradorビューワ

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

{
  "manifest": {
    "error": "SyntaxError: Unexpected token '<', \"<!DOCTYPE \"... is not valid JSON",
    "id": "https://touda.tohoku.ac.jp/collection/iiif/0/metadata/10020000011457/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-96b7bc8a-5403-4a23-8c1d-9c071e4d1b33",
      "cw-922b2c94-4935-4b91-9a07-e32d3904a138"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2ca75ad6-9392-4491-9b14-87713c7d61b0",
    "manifestId": "https://touda.tohoku.ac.jp/collection/iiif/0/metadata/10020000011457/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-922b2c94-4935-4b91-9a07-e32d3904a138",
    "thumbnailNavigationPosition": "far-right",
    "imageToolsEnabled": false,
    "imageToolsOpen": false,
    "language": "ja"
  }
}