You are experiencing a client sync issue when deploying the solutions for end-users over the User Center portal outside of the application server. The client sync happens without any errors when deploying inside the server.
It is likely that the sprtcmd.log reads a registry error code 11, indicating a certificate issue (Sync Error Code List). To resolve, the build can be re-installed to allow the sync to occur.
If re-installation does not resolve the issue, follow the instructions in Clients Not Syncing with Registry Error Code: 11 to troubleshoot the error.
If the issue still persists, please raise a Support Ticket detailing the logs from the user environment by following steps in Location of Troubleshooting Logs.