This is a known rare glitch from the original release of the game. but we ended up putting a work-around into the mobile version to help players get around the problem.
Here are the steps you can follow to resolve this:
- Load the saved game with problem.
- Go to the Pause Menu.
- Select the "Redeem Codes" option.
- Choose "Redeem Other Code".
- Redeem the following code: wgqu@qmnz
- Redeem this code as well: puck@howe
- Go to the world map and the next location should be unlocked
Unfortunately, this work-around is not available on some versions of the game - in that case you will need to load an older save file.