Hi @George,
The validation is working correctly now. The error messages are also showing when duplicate values are found in the database.
I resolved this issue by renaming the file extensions from .html to .apsx (suggested by @psweb in reference to another issue I had when setting up the login system, based on his video Full Login Procedure).
I don’t know whether there’s a way to resolve this issue by keeping the .html extensions. But if there’s any way, then it would be really helpful to know that as well.
Thank you for your continued support 