Thread:Sannse/@comment-47260293-20201027205609/@comment-8-20201028141445

The most common cause of that is the image being too large. It has to be less than 500kb

If that's not it, it may be because we are seeing a few database errors while we move big wikis to the new platform.

So I would suggest making your image smaller, and giving it another go.

If that doesn't work, please upload it here and I'll have a look