Mirador viewer

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

{
  "manifest": {
    "error": "SyntaxError: Unexpected token '<', \"<!DOCTYPE \"... is not valid JSON",
    "id": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll246/119/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-93e6d233-24bb-40ed-a963-e5b1e27154e2",
      "cw-7f1bd8c4-236d-4542-9df9-23e553faf445"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-7493daab-f266-4e45-9311-d632efa6f694",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll246/119/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7f1bd8c4-236d-4542-9df9-23e553faf445"
  }
}