Error displaying the edit form for original block once linked in Virtual Element

[jalamanderman]

Once an element that is inline editable is linked and used in a Virtual Element it is no longer able to be edited.

Steps to reproduce:

• Create a Content Block
• Create a Virtual Block and link the Content Block
• Click the content block and see 'Error displaying the edit form for this block

This only happens for inline editable elements.

Have reproduced a minimal, reproducible example using the silverstripe/installer boilerplate.