SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON
{
"manifest": {
"error": "SyntaxError: Unexpected token '<', \"<!DOCTYPE \"... is not valid JSON",
"id": "https://digital.libraries.psu.edu/iiif/info/maps1/20748/manifest.json",
"isFetching": false
},
"window": {
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"companionAreaOpen": true,
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],
"draggingEnabled": true,
"highlightAllAnnotations": false,
"id": "window-a3fd6e94-7678-41a8-97e0-1a718d16d395",
"manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/20748/manifest.json",
"maximized": false,
"rangeId": null,
"rotation": null,
"selectedAnnotations": {},
"sideBarOpen": false,
"sideBarPanel": "info",
"thumbnailNavigationId": "cw-91d8720f-194d-479c-9ab3-633fd7208536"
}
}