Error Showing When Trying to load Builder

[Thombo]

Getting this error when attempting to access Builder:

TypeError : Cannot use 'in' operator to search for 'active' in _2309

[Thombo]

My issue was being caused by some error in fxdreema Studio, Custom Block database error. My list of custom blocks had three "undefined " entries which I deleted, then the issue with Builder was also fixed.

[l'andorrà]

Interesting. I hope the admin reads this.