You can disable the certificate check performed by AltaVault by issuing the following commands:
1. SSH to AltaVault
2. Issue the commands:
no replication ssl verify-certs
3. You may receive a message "failed to connect, no process available" error, but you can ignore this as the setting is saved. After that's done, you can retry the cloud settings wizard. This should succeed.
You can import a CA + server certificate into StorageGRID Webscale and import the CA cert to AltaVault for SSL verification. The CA and server certificates could be self-signed or signed by known CA authority.
Please refer to this KB for instruction how to generate a self-signed cert for use with StorageGRID Webscale and AltaVault.