doevent/colorizator · Problem with manual anchors

Hey! At first thanks - of all BW>color tools I found on HF, this is by far the best. Still, photo I wanted to color isn't that good. I tried manual anchors, but it says:
"Error
type object 'Image' has no attribute 'update'"

Is it borken or did I do something wrong? I tried with JPEG, totally different PNG (all rather tiny, less than 1 MPix), but just in case it's ImageMagick dump of failed photo: https://pastebin.com/raw/LAfB8jmm

Things I tried as well:

other browser (Brave instead my usual Firefox)
selecting manual anchors:
** before upload of photo
** after upload, before processing (in this case both versions are grayscale, not processed at all)
** after processing
different settings (anchor count, size)

Let me know if photo is needed - it might be a bit controversial (Wehrmacht - let me remind, in contrast to SS or Gestapo, service was compulsory) - so then I'd have to provide context that I'm not about to colourize some war criminal. In fact he wat the opposite.