Server Side form validation not working properly (not showing messages)

Wappler Version : 3.7.4
Operating System : Win 10 Pro
Server Model: NodeJS
Database Type: MariaDB
Hosting Type: Custom

Expected behavior

What do you think should happen?

If an error occured (email already exists), I should see an error message.

Actual behavior

What actually happens?

The input border becomes red, but there is not error message displayed.

How to reproduce

Create a new form and try the server side validation (field required or anything else).

Actually it’s the same error as described in this old post: Server Side validation message not working - Validator.js present, Linked filed Name correct

And I’ve lready checked everything, as described in the post too.