DOS_names_created - Status in Urbackup Server

Hello friends
I have an Urbackup Server on a Windows 7 PC. On it I have an extra disk of 1 tb where I want to store the backups of the clients. I have already done the configuration of the Path to Backup Storage, but it presents the following message in the dashboard:

The directory where UrBackup will save backups is inaccessible. Please fix that by modifying this folder in ‘Settings’ or by giving UrBackup rights to access this directory. (dos_names_created)

Has anyone ever experienced this?
Would you help me?