One node is in down status and I don't know how to repair it

Hi,

I have a M10 replica set on MongoDB atlas under MongoDB 8 and one of the nodes is currently down since more than the 24 hours oplog window.

I have now this message “We are deploying your changes: 0 of 1 servers complete (current actions: resyncing 1 server, configuring MongoDB)”.

I tried to increase the cluster to M20, increase the oplog window to 72 hours and increase the node number to 5 without success.

How can I repair this node? Or how can I remove it and reload a new node?

Thanks for your help.