Mirador viewer

SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON
{
  "manifest": {
    "error": "SyntaxError: Unexpected token '<', \"<!DOCTYPE \"... is not valid JSON",
    "id": "https://api.fitz.ms/data-distributor/iiif/object-44116/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-63817c9c-1d9a-41c7-a0f0-618420c9b34b",
      "cw-972031a3-62da-42b2-9cad-412c16ef5066"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b861cce3-5f60-432a-94b6-ea0c3e681096",
    "manifestId": "https://api.fitz.ms/data-distributor/iiif/object-44116/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-972031a3-62da-42b2-9cad-412c16ef5066"
  }
}
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