If a validator is configured for a field inside a Blossom dialog, a template error occurs when the dialog gets loaded for editing. The dialog cannot be opened.
The cause for this error is the getValidatorName() method in the class
In line 45 the getName() method of the ConfiguredFieldValidatorDefinition instance is called. This returns null for a validator configured with Blossom. When null is passed to the of method of Optional, a NullPointerException is thrown:
This bug is related to an already existing open issue in #BLOSSOM-245