Zero tier GUI Installation Error

Good day experts, I am new in Linux and i am using mint OS (Linux Mint 21.2 Victoria \n \l). I am trying to install the zero tier GUI version following this link ([Guide] Zerotier + GUI on Linux Mint / Ubuntu). Everything goes smooth and the very end getting a Note saying N: Download is performed unsandboxed as root as file ‘/home/sunny/Downloads/Zerotier-GUI_Build/ZeroTier-GUI.deb’ couldn’t be accessed by user ‘_apt’. - pkgAcquire::Run (13: Permission denied). After that if i try to run Zero tier gui it gives me an error saying zero tier GUI is not installed. What am i doing worng? Please help. Thanks in advance.