---
title: "Unknown error when loading OptimizeBuilder"
description: "Unknown error when loading OptimizeBuilder"
url: https://docs.optimizepress.com/en/articles/366-unknown-error-when-loading-optimizebuilder
collection: "General Troubleshooting"
updated: 2026-09-28
language: en
---

# Unknown error when loading OptimizeBuilder

Unknown error when loading OptimizeBuilder

**Unknown error when trying to load the OptimizeBuilder**

This issue can be caused by permalinks not being set correctly...

If you do not have your permalinks set to the "Post name" setting - our Builder and other features will NOT load

This setting is required in order for successful operation of the OptimizePress Builder

To fix this issue go to 

WordPress > Settings > Permalinks and switch to "Post Name"

**Save the settings**

Your editor should now load