Taxonomy / Selections: regression: Validation errors for fields/values not shown

Steps to reproduce:
1. Install taxonomy
2. Add to a new document type a taxonomy field and mark it as required
3. Using selections tool from essentials configure a field from a value list and mark it as required
4. Create a document of this type and try to Save & Close without selecting any values

Expected: Besides the red title of the field below it I can see a feedback error message

Result: the feedback error message is missing