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/p16022coll230/2065/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-293aa0b0-9899-4a6a-9a14-93ef573d179a",
      "cw-b0a0aa96-5b57-40cf-81a0-1cbbd5546c46"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-78a0951a-b4e2-4904-af44-188ab5c85973",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll230/2065/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b0a0aa96-5b57-40cf-81a0-1cbbd5546c46"
  }
}