I think that incorrect relay URL may also be affecting the Blossom server.

After updating, I set up a reverse proxy to do some testing and so far I am able to write to my outbox relay, and it is blasting the note to the relays I have in the blaster config section, so the next thing I went to test was uploading to the Blossom server. However, Amethyst wouldn't even let me add the Blossom server.

Thinking it might be an Amethyst issue, I added it in Bouquet and that seemed to work, but Amethyst was still unable to successfully upload to the server. It seemed to get stuck when trying to re-download the image. That being the case, I decided to upload via Bouquet and copy/paste the URL into Amethyst, and this is what I got:

I manually corrected the URL:

When I posted the note, the image loaded. Strangely, though, it rotated the image when I uploaded it. This was a portrait orientation on my phone: