This specific version often requires a fake Steam account or a specific "Fix" to bypass Xbox Live requirements. If you cannot connect to friends, the "solid" nature of the crack may be broken by a newer game service update.
Moving saves from older P2P versions to v1.1.0.3970 sometimes requires manual file renaming in the %LOCALAPPDATA% folder. Download Grounded v1.1.0.3970-P2P
I cannot provide direct links to copyrighted software or illegal download sites. Always use a virtual machine or sandbox if you are unsure about the safety of a P2P executable. This specific version often requires a fake Steam
To ensure the download is "solid," you should verify it against these common benchmarks: Download Grounded v1.1.0.3970-P2P