Version

3.0.0

Reproduction link

https://jsfiddle.net/hs75Lmd3/

Steps to reproduce

What is expected?

No error

What is actually happening?

Throws error

you are using vue2

you are using vue2

The JsFiddle shows Vue2 but I am using Vue3.

The fiddle is just to show the code. The code needs router setup and some other custom code so its hard to put all that in Js Fiddle.

then pleasse provide a small github repo with a actually runnable reproduction.

The template for reproductions for vue-router in on the issue helper (https://jsfiddle.net/posva/3yq6ojLv/5). One thing I see in your code is formData, @prev-page, @next-page, etc are all passed to router-view instead of component. If you manage to boil it down and reproduce it with router-view, please open an issue on vue-router-next repo