Switch from full to simple recovery model to resolve the issue
Adding a machine to the Acronis Management Server fails with "The machine has already been registered". However the machine is not in the Acronis Management Server
Add the NETWORK SERVICE user to the %temp% folder with Full control permissions to solve the issue
Add the NETWORK SERVICE user to security policies to solve the issue
Acronis Recovery for SQL Server is not a cluster-aware application, and does not include support for cluster-related settings or events
Restart Acronis Management Server Service to resolve the issue
Table of operating systems supported by Acronis products
List of limitations for trial versions of Acronis products
To work around the issue, add the servers manually
The problem is in incorrect SSL certificate generation for intercomponent connections of Acronis products. As workaround, try disabling SSL encryption