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/p16022coll205/283/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ac9d78f0-db07-488a-bfa6-3dd0ba1352df",
      "cw-ccad9573-32fc-48a2-a100-bf289f53c68f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e0e11cfb-07b3-47fc-8b83-6cfc9955314e",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll205/283/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ccad9573-32fc-48a2-a100-bf289f53c68f"
  }
}