Fetch table data - Error executing query

Hi all. I’ve been following the excellent getting started guide as I wanted to see if there were any updates to the user registration and login functionality.
Anyway. Followed it word for word, action for action. My User Registration screen front and back-end match the settings in the video. Except, when I click the Submit button to register my new user account nothing happens on-screen. Web browser backend shows an Error 500 from the server.
Looking in Wappler, opening my Users table and clicking the Fetch Data button generates an error message. I’ve attached the message so you can view it.
I have closed Wappler and relaunched it. I have no db changes outstanding. Every page and the db has been saved and applied, all with success messages.

I’d be very grateful for any pointers. Many thanks.

https://docs.wappler.io/t/debugging-server-connect-errors/2857 this will help with the sign up

Looks like something is wrong with your database structure in the screenshot