252: PHP installation lacks graphics extension
You linked an image file with [j]-> or a local still image for a media file with [v]-> or [w]->. The Aneamal Translator automatically generates a preview image in these cases. To create a preview image, the Imagick or GD extension must be activated in your PHP installation and be able to save a JPEG image. Neither extension is available in your case.
Solution
Ideally, install the Imagick or GD extension or ask your web hosting service to do this for you.
You can still use Aneamal with only few limitations, if you can not or do not want to enable these extensions. You can create a preview image on your own for instance, upload it and link it with an optional additional link to the full size file using [i] instead of the [j] file token. For example:
[i]->small.jpg->elephant.png
If the error occurred in connection with a still image for the [v] or [w] tokens, you can link to the still image with an absolute address instead of a relative address like this:
[v]->https://example.org/poster.jpg->movie.mp4
The Aneamal Translator will not attempt to generate a preview for it then and use your image unchanged. If the still image is for a video, it should already match the video dimensions then or at least its aspect ratio. This is to avoid an irritating jump in the webpage once the video starts to play.