[v4] Panel fails to load with Custom Block Selector Plugin

[tobimori]

Description

With the Kirby Visual Block Selector Plugin installed, the panel fails to load and shows a white screen.

Screenshots

To reproduce

Install Kirby 4 Beta & the linked plugin above.

Your setup

Kirby Version 4.0-alpha.1

Console output

index.js?1684517147:137 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'options')
    at panel.plugin.use (index.js?1684517147:137:32)
    at t.use (vue.js:11:47444)
    at index.js:1:363675
    at na (index.js:1:363692)
    at Object.create (index.js:1:368396)
    at index.js:1:374240

The error is related to this line but would probably occur for all following lines accessing original.options.