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/p16022coll230/2545/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-fd47944e-8f07-408f-850c-76471fbd313d",
      "cw-4cd2b331-20eb-47c2-a00b-44fd5a45ff9f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-d3d5fa5c-5f6d-4753-a022-9edd3e80338a",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll230/2545/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-4cd2b331-20eb-47c2-a00b-44fd5a45ff9f"
  }
}