Plugin throwing a dashboard error

We are not able to access the dashboard on this plugin from the left sidebar and get this message. Please advise how to fix.

![Screenshot 2023-07-06 at 11 54 39 AM](https://github.com/mediabeastnz/craft-commerce-back-in-stock/assets/111894156/613f5ebc-90de-45a7-b4c5-927ab42b214d)
