254: Could not save preview image

The Aneamal Translator tried to save a preview of an image which is linked in your Aneamal file with the [j] file token or of a still image for a media file linked with a [v] or [w] file token. Unfortunately, saving the preview failed.

Solution?

This is an unexpected error without an obvious, general solution.

You could try to re-upload the original image file, reload the webpage then and see whether the error disappears.
You could also check whether the preview file already exists, but the file permissions prevent it from being overwritten or accessed publicly.
If you have activated the previews fix, try removing it from your fix metadata declaration.

A workaround would be to create a preview image yourself, upload it and link to it with the [i] instead of the [j] file token:

[i]->preview.jpg->original.jpg

The Aneamal Translator will not create an preview automatically then. Still images for media files can be linked with an absolute address as in the following example to prevent the Aneamal Translator from creating a preview automatically.

[v]->https://example.org/still.jpg->video.mp4