There is an error on customer's CCP and there is no link to VZPP from CCP while that error is showing.
Error occured during the last operation on the VPS. Please contact your provider. You can view and manage your domain(s) using the "Hosted Domains" link on the Home screen.
There is also a failed task related to the container:
Task name Create backup of VPS 'vps-ID.domain.tld' from HN 'vzwinXXX' Last execution output -1 : Can't lock Container.
Most probably the task failed because the container was in a transitional status.
Log in to the Hardware Node and check the container state using 'vzlist' command.
If the container is still in a transitional status, you may follow this article: #112953
If it is in 'running' state, you may simply rerun the failed task, it should complete successfully.