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/p16022coll289/14/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-19dc1e05-10fd-4f0f-ac89-a7765d6a0cce",
      "cw-c61b3e4b-05d2-4057-b8c7-82f86c53c64c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c2a11654-690b-490a-aea3-b2f4bcba4443",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll289/14/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c61b3e4b-05d2-4057-b8c7-82f86c53c64c"
  }
}