Ah I see that you protected all the fields. This means that resetting local changes will not work.
What fields did you make changes to in your cards? If for example you only changed a few cards, you can instead only protect those individual cards rather than all cards
This is discussed more in-depth here: 🔐 Protecting Fields and Tags
If you unprotect the text and extra field then reset local changes then you’ll get all the information in those fields (same with any other fields you unprotect)