Access Denied - Failed to connect

Hello I've installed PDQ Inventory on a computer in a small workgroup but I receive following error when I want to scan computers ( or a specific computer):

Access Denied - Failed to create target directory Access to the path '\ComputerName\ADMIN$\AdminArsenal\PDQInventory-Scanner' is denied.

I can't do it even on my computer :

Access Denied - Failed to connect to target share

Specified user is defined on all computers. we use it in the way:

Domain: . ( Dot) Username: something password: something

(Using Administrator doesn't make any sense)