Issue #3357133 by robphillips: DivisionByZeroError on AspectSwitcherImageEffect.

src/Plugin/ImageEffect/AspectSwitcherImageEffect.php

@@ -202,6 +202,10 @@ class AspectSwitcherImageEffect extends ConfigurableImageEffectBase {
    *   The name of the image style to process.
    */
   protected function getChildImageStyleToExecute(int $width, int $height): ?string {
+    if (!$width || !$height) {
+      // Image is probably corrupted when dimensions are missing.
+      return NULL;
+    }
     $ratio_adjustment = isset($this->configuration['ratio_adjustment']) ? floatval($this->configuration['ratio_adjustment']) : 1;
     // Width / height * adjustment. If > 1, it's wide.
     return (($width / $height * $ratio_adjustment) > 1) ? $this->configuration['landscape_image_style'] : $this->configuration['portrait_image_style'];