Goodbye 8th Year Event Goals Fix
A fix is now live. An additional goal, Earn 5 Stars, has been added. Completing this will grant the additional 500 RP to complete the reward track.
Hi, Mustafa -- this is actually a known issue relating to a bug that befell the game some time ago. Due to its complex nature, the game team is still working to identify and implement a fix while also making sure the fix doesn't corrupt affected player game accounts. Please feel free to read more discuss this topic here.