Azure VM too many connections from IP

I created in Azure Cloud a SFTP Gateway v3 from marketplace. I followed the Gateway documentation. Besides the Virtual Machine, it created the additional Virtual Network, Network Security Group, IP, etc.
I am able to connect through the browser and login into the admin UI where I configure users. I want to SSH using the Windows command prompt as administrator.

I get an error saying my IP has already too many connections.

C:\Users\your.user\Downloads\Folder-with-ssh-key> ssh -i my-key.pem [email protected]
The authenticity of host '12.345.678.90 (12.345.678.90)' can't be established.
ED25519 key fingerprint is SHA256: 9s....
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '12.345.678.90' (ED25519) to the list of known hosts.

Received disconnect from 12.345.678.90 port 22:12: User has too many connections from current IP
Disconnected from 12.345.678.90 port 22

I restarted PC. Deleted VM and the other resources. Recreated it. Could not find on the internet what could cause this already opened connection somewhere. Do you know in Portal Azure where to look for solution? I suspect the configuration of Networking Inbound settings might be the cause.