I believed that you using katadelos's jailbreak method (
https://www.mobileread.com/forums/sh...d.php?t=346037)
When you tap screen, you will see the following message
This demonstration device is either missing
content or is disconnected from the network
CONFIGURE DEVICE
To skip the misconfiguration lock to the Home screen, you need to perform "secret gesture" (two-fingers tap on the bottom right of the screen, then single finger swipe from right to left) - may require multiple attempts, please see the following short video to understand.
https://www.youtube.com/watch?v=JzuIGbGPpig