Good day Thaksan, thanks for your question. I am glad to be able to provide assistance to you today. Sorry to know about this and a cooldown has been implemented several months ago and you can refer to the links below for reference that also includes the points breakdown.
https://www.trueachievements.com/news/microsoft...
https://www.yahoo.com/tech/microsoft-rewards-is...
https://www.microsoft.com/en-us/rewards/about
I would suggest also to monitor it for a bit more of time as there might be an issue on the system or server that is interfering with this one but if it will still be same later today or tomorrow then you can head over to the link below to check it directly with the MS Rewards Support as they have information and access to provide on what transpired on the issue that you have encountered and my apologies as this is a user to user forum and therefore we do not have inside access to be able to cross check this from our end.
https://go.microsoft.com/fwlink/p/?LinkID=823675
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Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
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Regards,
Paul R.