eSIM configuration failure: CT CELLULAR PLAN ERROR INVALID FAUX CARD MESSAGE CARRIER LOCK NO CARRIER

I used to have a Thai eSIM on my iPhone XS Max. I bought a new iPhone 15 Plus and thought I had transferred all the data, including the eSIM, but it didn’t transfer. I went to True to get it installed, but they encountered an error on the phone: "CT CELLULAR PLAN ERROR INVALID FAUX CARD MESSAGE CARRIER LOCK NO CARRIER."

They don’t know how to resolve it. They gave me a regular SIM card, so I'm using that for now.

I have the latest iOS 17.0.3. Resetting the network settings and restarting the phone didn't help.

Does anyone know what this error is and how to install the eSIM?