NWBC 5.0 only 3 starts possible

Hello together,

the problem is, that we can start nwbc 5.0, 3 times in a row. After that it isn´t possible to start it again. When we move to the path:

C:\<user>\AppData\Roaming\SAP\NWBC\Backup  and delete one File, we can start it again. When we delete all Files in this Backup folder, we are able to start it again 3 times.

From log-file: UnauthorizedAccessException: Access to the path 'C:\Users\admin\AppData\Roaming\SAP\NWBC\Backup\SAPUILandscape.xml.15020201' is denied.

I attached the log files, I hope you can help me.

Thank you and greetings