Property value editor messages are not shown in the client

[Migaroez]

Which Umbraco version are you using? (Please write the exact version, example: 10.1.0)

14.3.1 and 15.1.0

Bug summary

Custom messages for invalid property generated by property value editors are not shown in the client.

Specifics

The correct items is highlighted, but the specific message is not shown even when you hover the marker

Steps to reproduce

Use branch #17761 or #17762

• Setup a media picker with limited amount of items.
• Create a document type/document that uses the media picker
• Try to Save & publish the item with to many or to few items compared to the configuration

Expected result / actual result

Client displays the error message it receives from the validate endpoint.

[AleksandrRogov]

hi @Migaroez , could this issue be related to validation messages not displaying in property editors inside the block editor if setting them through code? (I am hard coding values just for testing)

The code above kind of works, the block editor cannot be closed when trying to save changes and there is an invalid icon on the property editor. But there is no "test message" anywhere.

[NguyenThuyLan]

By the way, I want to note that there is an issue that it cannot save the custom validation option when you change for any property editors. It could be a part of the reason