Hey Venelin_Bastrev, I’m sorry to hear that your game is crashing when you try to purchase these Special Offers. If your game is connected to a Facebook, Google Play store, or Game Center account, could you please go ahead and try clearing the cache on your device? Doing this could clear up some memory and help your game run smoother. However, if you’re on a guest account, please avoid doing this as it could lead to data loss.
A player from this thread also had a similar issue, and the information I provided there could be helpful to you. You can find the thread here: One time level up offer glitched
There are also some troubleshooting steps listed for connection issues here that could help if you try them: Stuck on loaded screen of game?
If you’re still having an issue with this, our support team would be glad to help. You can email our staff here at firstname.lastname@example.org, including your support key in the email.