I'm unable to claim rewards of march

Hi @sams2210, payout is currently processing. This was posted yesterday:

Have a read through it, check your setup is all right, and just wait a bit - it can take up to several days to process all. Support should post any updates to it, too.
If your problem persists after processing has ended (when the icon changes to red, I believe), you can follow the instructions about contacting Support in the second half of that post.