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/p16022coll205/388/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-892927b8-38b8-4d9d-aab4-507408b5538d",
      "cw-9b4304ab-d162-4f38-a33a-461f395199b3"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1312371c-3318-43c5-bd09-3204fc20ffde",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll205/388/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9b4304ab-d162-4f38-a33a-461f395199b3"
  }
}