--disable-preview-resize leads to Internal Server Error when opening any image

[nuclearmeltd0wn101]

This option at earlier releases was just sending images as is to preview window, and by that reduces CPU load.

Yet now it simply breaks previews at all.
If you try to load a preview, server returns plaintext, containing only HTTP 500 error code description: "500 Internal server error".
However, image download works.

I was running I don't remember which version on old ARMv7 WDMC NAS,
yet now I built a new one, under x86_64, and now running docker image (filebrowser/filebrowser:latest). so now it's v2.17.0 and there --disable-preview-resize messes up whole image previews option.