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/p16022coll205/694/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-16cf2831-51e6-4175-9af8-20d0915413c3",
      "cw-88d891ad-211e-495c-b25d-a0dd0cfe6df7"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0a42f2a9-a139-427a-b4d1-cd8e00b56ec0",
    "manifestId": "https://cdm16022.contentdm.oclc.org/iiif/info/p16022coll205/694/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-88d891ad-211e-495c-b25d-a0dd0cfe6df7"
  }
}