Good day
Thank you for usingĀ Microsoft Community!
It seems that you have encountered an error message INTERNAL_SERVER_ERROR_Recurrence when redeeming Office 2019 HS.
We are sorry for the inconvenience the issue has caused.
Microsoft has been aware of this issue recently and has a team working to fix it and it should be resolved shortly, you may please kindly wait for some time.
You may please use Office Online to use Office on Website to handle documents as a temporary resolution.
This error mode may be caused by the Internet connection or account issue, you may still please follow the steps below to see:
You may change between WIFI/Network cable or 4G hotspot network to see if you can redeem.
Or you can create a new Microsoft account in account.microsoft.com to check if the redeem is normal in the new account.
Thank you for your time and effort in working on this issue.
Best Regards,
Silvia | Microsoft Community Support Specialist