DivisionByZeroError: Division by zero in template_preprocess_image_style_preview() (line 51 of core/modules/image/image.admin.inc).

The above patch does not seems to be apply. @Siddhraj you have made changes in the core file. This issue should be fixed within this module itself.

Hello, folks.

I'm using Drupal 9.5.10 and stumbled upon the same error.
"DivisionByZeroError: Division by zero in docroot/core/modules/image/image.admin.inc on line 72 #0 [internal function]: template_preprocess_image_style_preview(Array, 'image_style_pre...', Array)"

I'm always seeing solutions about permissions. How do I set the right permissions for it to work? Thank you.

Hi,
in my case had a wrong configuration on Dockerfile, I solved it like this:

FROM php:8.1.6-apache

RUN apt-get update && apt-get install -y \
    libwebp-dev \
    libpng-dev \
    libjpeg-dev \
    && docker-php-ext-install -j$(nproc) gd \
    && docker-php-ext-configure gd --with-freetype --with-webp --with-jpeg \
    && docker-php-ext-install gd

The problem is due to a wrong configuration of GD on the server and not to the code.

The failure occurs in Drupal core, not in the module. The module’s image toolkit under some circumstances may not be able ti generate the output image, but even if that happens, the failure should be logged, and not cause WSOD.

Also, patch in #6 is for Drupal core.

Moving the issue to Drupal core’s queue.

Can we get a failing test as a next step.

This can be caused by misconfigured imagemagick executable path, see /admin/config/media/image-toolkit.

I can confirm that the answer in #11 worked for me -- it was resolvable by configuring the GD toolkit "correctly".

Also ran into this today - in my case setting proper permissions on the files folder did the trick as well, so thank you @zigazou for sharing.