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/p16022coll205/433/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b3cb30f0-d2d6-4a9a-a942-8368092ac64a",
      "cw-f54e7cb1-ef20-433d-a42b-b14294adfaef"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b7ba7f1b-a7f2-4728-8659-469f67111403",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll205/433/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f54e7cb1-ef20-433d-a42b-b14294adfaef"
  }
}