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/p16022coll205/369/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4ae644f1-bf3c-4b10-a0e8-553fcb49b2ad",
      "cw-285455b3-4758-4dbc-8b6d-106916203251"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-45f5e17a-01ef-48a4-a4cb-18515b7b4912",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll205/369/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-285455b3-4758-4dbc-8b6d-106916203251"
  }
}