Popup Builder Scheduling Won’t Delete

Popup Builder Scheduling (https://popup-builder.com/product/scheduling/) is an extension for Popup Builder that allows popups to appear when they’re needed.

As we are removing Popup Builder from our plugin stack due to the constant recurring security threats, we also need to remove Popup Builder Scheduling. However, when we go to do so, we’re always met with the same error – “There has been a critical error on this website. Please check your site admin email inbox for instructions.”

It appears that this extension cannot be deleted, which is concerning considering the constant security threats about Popup Builder itself. Please advise on how to successfully remove this extension, as we’re encountering the issue across multiple sites and installs.