nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqgxjz6vzpu7rcj3khflp8wfupk38v0603kzd946e7v8gvxqgstwmstekrnx It likely means your HTTP server is rejecting the request (not Mitra).
For nginx, you...
@silverpill Thanks for this. It worked for the post though lol , which is weird. Is the avatar different size image?