PhotoObject not displaying in Web interface but is in Plex Media Player?

My channel creates PhotoObjects as below (modified a video example I found on this forum). It shows the photo thumbnails fine, but when I click on one to view it full screen in the Web interface, all I get is a blank screen. When I select it in Plex Media Player it begins a slideshow and shows the photos as expected. It also works in the Plex Windows 10 app. Any idea what the Web interface is expecting different than the other apps? Maybe a minimum set of attributes for the photo?

def CreatePhotoObject(url, title, summary, originally_available_at, thumb, include_container=False):
photo_obj = PhotoObject(
	key = Callback(CreatePhotoObject, url=url, title=title, summary=summary, originally_available_at=originally_available_at, thumb=thumb, include_container=True),
	rating_key = url,
	title = title,
	summary = summary,
	originally_available_at = originally_available_at,
	thumb = Resource.ContentsOfURLWithFallback(url=url),
	items = [
		MediaObject(
			parts = [
				PartObject(key=url)
			]
		)
	]
)

if include_container:
	return ObjectContainer(objects=[photo_obj])
else:
	return photo_obj

Turns out there was a bug in the Plex Web Client [BUG] Channel Photos not loading (Fixed) but has been fixed.

However there is a new cropping issue: [BUG] Channel Photos Crop to a Square.

Thanks - I actually participated in that discussion :). I am waiting for the new Web Client to be included in the server build.

I exchanged WebClient.bundle in PMS 1.3.4 (…/Plug-ins-a17e99e/WebClient.bundle) with the WebClient.bundle from PMS 1.0.0. - it works fine for me. It also fixed the Play-Direct-issue with TV-Live-Streams (m3u8-Links).
/R


######Plugins: ARDMediathek2016, Plex-Plugin-KIKA_und_tivi, Plex-Plugin-3Sat_Mediathek, Plex-Plugin-Flickr, Plex-Plugin-TagesschauXL