We have just performed another Live Server Update meant to fix the upgrade system of the Earthquake Spell.
note: If you already tried an upgrade that was unsuccessful you should receive back your currency automatically. If by any chance, your tokens/gems/gold was not reinstated after logging in again, please get in touch with our Customer Support Team by clicking here and our colleagues will get back to you with relevant feedback.
Your understanding and patience are truly appreciated!
Your Royal Revol 2 Team