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/p16022coll205/344/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a0158d16-ab1a-4c7c-8ff9-7ce290d1d7b1",
      "cw-2832354e-9b0e-4405-9818-a9da9015f876"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-fa40a7cb-2a1a-44bb-87c9-8f6c8a37340e",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll205/344/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2832354e-9b0e-4405-9818-a9da9015f876"
  }
}