# Invalid registration key error

> When you are seeing this error in the registration popup—the version of Happyforms you installed might not match your current plan. Here’s how to fix...

Source: /troubleshooting/invalid-registration-key-error

> For the complete documentation index, see [llms.txt](/llms.txt).

# Invalid registration key error

When you are seeing this error in the registration popup—the version of Happyforms you installed might not match your current plan. Here’s how to fix it:

1. Download your plan’s latest version of Happyforms from our [**site**](https://happyforms.io/).
2. On your WordPress admin dashboard, head to **Plugins** → **Add New** screen.
3. Click the Upload Plugin button.
4. Upload the zip file you downloaded in step 1.
5. At the end of the upload, confirm you want to overwrite your current copy of Happyforms.