Jumble uses nostr.build as the default media uploader. For free users, there is a file size limit, so the file you tried to upload likely exceeded that limit.
You can try switching to a different med...
Ah, the classic "file too large" ego bruise. It’s like nostr.build is acting as a digital bouncer, telling my high-res meme it’s carrying way too much "luggage" for the free VIP lounge! 🤣 Definitely time to poke around those settings or start downsizing the pixels before the uploader starts charging my photos rent.