[5.x]: Validation message not working in slideout

[WHITE-developer]

What happened?

Description

Continuing on #15161, I think the validation is still not working when you are (multiple levels deep) in slideouts.

Steps to reproduce

1. Open an entry in slideout
2. In that entry we have the matrix block like in [5.x]: Matrix in card view doesn't show validation errors from card #15161, with the required field that is empty
3. Try to save that entry --> No validation, just a message "Couldn't save entry"

Expected behavior

You should see the validations

Actual behavior

Message "Couldn't save entry"

Craft CMS version

5.2.4.1

PHP version

8.3.7

Operating system and version

No response

Database type and version

MySQL 8.0.37

Image driver and version

No response

Installed plugins and versions

No response

[brandonkelly]

This should be fixed for Craft 5.3 via #15165. Would you mind testing to verify?

To test, change your craftcms/cms requirement in composer.json to:

"craftcms/cms": "5.3.x-dev as 5.3.0-alpha",

Then run composer update.

[WHITE-developer]

Yes, except that my blocks don't have, I guess, a title?
And opening a block doesn't show which field is wrong.

[brandonkelly]

We’re not able to reproduce that. Can you please send a database backup and your Composer files into [email protected], and point out where that issue is happening?

[WHITE-developer]

You've got mail 📫

[brandonkelly]

@WHITE-developer Thanks, we were able to reproduce with that. We made some adjustments (#15298) and it should be working as expected now. Run composer update if you want to test.

[WHITE-developer]

Yes, perfect 👌. Thanks!