I ran into below issue in the RDP sever. I am posting this here as solution so incase if anyone runs into this they can reference it.
Use Application: Open File - Security Warning: Cannot bring the target application in foreground. The action was blocked by the current foreground window ‘Task Manager’ from the process ‘taskmgr.exe.’
To solve this issue: I logged into RDP as myself and opened up task manager and expanded under the user I was using for running the unattended (svc-uipathtestb2) and closed the task manager and then reran and it worked successfully.