Thanks for your report. We've manually fixed your account now, and that also means that the issue cannot return. The cause of this issue (a bug with the Magic Academy) was fixed, but for those affected by it before the update, it may still occur. It is fairly easy to fix this:
1. Open your Magic Academy
2. Start production
3. Cancel production (if you don't want to produce anything, this step is optional)
4. Reload the game
This will solve your problem. With the update to 1.3 we will also be able to fix the effect for those still affected. We hope to be able to deploy that update on our servers soon. In the meantime, you can use the workaround described above, or alternatively you can contact Support.