NS8 Local S3 backup

I’m trying to set a local s3 repository, I configured s3 service on a truenas 13 machine.
I login in s3 web interface and create a bucket
I tested the bucket from command line with mc command and everything seems ok
If I try to add s3 compatible repo I have an autentication error.

Any idea?

Thank you

Please report back the error.
Make sure also the s3 service has valid SSL certificate.