java.lang.ArithmeticException: / by zero (Division by Zero)

What the log looks like

java\.lang\.ArithmeticException: / by zero

How to fix it

1. Open the crashing side's full crash report or `logs/latest.log` (if a player disconnects from a server with `Connection reset`, check that player's client crash report, not the server log) and find `java.lang.ArithmeticException: / by zero`.
2. Read the first 3 to 5 `at ...` lines directly below `/ by zero` (skipping `java.lang.Math`) to spot the responsible mod's package name or Mixin tag, such as `de.keksuccino.fancymenu` or `handler$...$bobbyUpdate`.
3. If the crash happens when opening a modded screen or terminal and `fancymenu` appears in those lines, update or remove FancyMenu, or disable its customization for that GUI.
4. If the crash happens when joining a server or loading a world with `bobbyUpdate` in the stack trace while using OptiFabric, remove either Bobby or OptiFabric/OptiFine.
5. If the error triggers during an Applied Energistics 2 autocrafting job (`appeng.crafting.CraftingTreeNode.request`), look for AE2 addons in the stack trace (such as AppliedE or OmniSequence) and remove or re-encode patterns whose output item count is zero.
6. If another mod is named right below `/ by zero` and you recently changed configs or resource packs, inspect that mod's config file for any rate, interval, scale, or count set to `0` and restore its default value.

Check your own log