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/p16022coll205/560/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-e2cb09b1-8cde-4de2-9090-13c90d06446f",
      "cw-816df52d-17e1-4c37-a98f-44dd96371c9d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-bdcddac7-b9e7-49e1-bb1c-8aee0450f472",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll205/560/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-816df52d-17e1-4c37-a98f-44dd96371c9d"
  }
}