Such an error usually appear in case some of the game files were damaged or the game was downloaded from a third-party source.

In this case, please, delete the game from your device, then go to Files - Android - data - com.melesta.coffeeshop - delete this folder. After that download the game again from the official store - Google Play or App Store.

If none of the recommendations above was helpful, please contact our support team using this link.