Boost For Lemmy

Can you try uploading it on the website and see what happens? Some instances might be blocking uploads of certain types.

You can also upload elsewhere and link to it

Can you try with a small image that's less than a megabyte?

It might be an issue with lemm.ee

Lemm.ee has limits on image uploading because the admin doesnt want to pay hundreds of dollars for hosting images that someone uploaded for one post years ago. Therefore users registrated on lemm.ee are encouraged to upload pictures to services like catbox.moe, imgur, postimages.org or similar and copy-paste the image URL into the URL field when posting.

I run into this problem too. In my case I finally figured out that it's an image size problem, as the other commenter said, though the error doesn't message that, it just fails without explanation. What I would like is an image resizer within the app so I could just shrink it down, and generally some way to know before failure what I'm supposed to do. Some of that could be solved within Boost, but I understand not all of it.

Another person said that instances will encourage uploading to imgur or catbox - but catbox files don't get previews on Boost, so that's no good. At least for me anyway - but that's kind of a separate topic.